chaeksangeul jeongrihaneun gime jiugaerang gawido seorabe neoheosseo.

-는 김에 means something like:

• while I’m at it
• since I’m already doing that
• taking the opportunity to do something else

So 책상을 정리하는 김에 means:

• while I was tidying the desk
• since I was already cleaning up the desk, I went ahead and...

It often implies that the second action was done because the first action created a good chance to do it.

In this pattern, -는 김에 is the normal form with action verbs.

• 정리하는 김에 = while tidying / since I’m tidying
• it focuses on the action as an ongoing situation or occasion

Even if the whole sentence is in the past, Korean still commonly uses -는 김에 to describe the situation that provided the opportunity.

So:

• 책상을 정리하는 김에 = while I was tidying the desk / since I was tidying the desk

It is best to learn -는 김에 as a set grammar pattern.

김 in this grammar pattern is a noun meaning something like:

• occasion
• chance
• opportunity
• while one is doing something

So -는 김에 literally has the idea of:

• on the occasion of doing X
• while doing X, taking the chance to do Y

You do not usually translate 김 by itself in a sentence like this; it is more natural to understand the whole pattern -는 김에 together.

Because 책상 is the direct object of 정리하다.

• 책상 = desk
• 정리하다 = to tidy, organize, put in order

So:

• 책상을 정리하다 = to tidy the desk

The -을/를 particle marks what is being tidied.

랑 is a casual way to say and between nouns.

So:

• 지우개랑 가위 = the eraser and the scissors

Other similar forms are:

• 하고 = casual and
• 와/과 = more neutral/written/formal and

Examples:

• 지우개랑 가위
• 지우개하고 가위
• 지우개와 가위

All can mean eraser and scissors, but 랑 sounds natural and conversational here.

In this sentence, 도 is most naturally understood as applying to the whole phrase 지우개랑 가위.

So:

• 지우개랑 가위도 = the eraser and scissors too / also the eraser and scissors

Even though 도 is attached to the last noun, it often affects the whole coordinated phrase.

The idea is:

• I was tidying the desk,
• and while I was at it,
• I put the eraser and scissors too into the drawer.

If you wanted to emphasize each one separately, you could say something like:

• 지우개도 가위도 서랍에 넣었어
• I put both the eraser and the scissors in the drawer too

Because 도 replaces the object marker here.

In Korean, a noun usually does not take both 도 and 을/를 in the normal straightforward way. Instead, 도 itself carries the role of also/too, and the sentence still makes sense because the verb shows what role the noun phrase has.

So:

• 지우개랑 가위도 서랍에 넣었어 = I also put the eraser and scissors in the drawer

The phrase 지우개랑 가위도 is still the object of 넣었어, even without -을/를.

With 넣다 (to put in), 에 marks the destination or location something goes into.

So:

• 서랍에 넣다 = to put into the drawer

Here, 서랍 is the place something is being placed into, so 에 is correct.

Compare:

• 서랍에 넣었어 = put it in the drawer
• 서랍에서 would mean at/in the drawer as a location where an action happens, which is not what 넣다 needs here

A good way to remember it:

• 에 often marks to / into / at
• with movement or placement verbs, it often marks the destination

넣었어 is the past tense casual form of 넣다.

Breakdown:

• 넣다 = to put in
• 넣었어 = put in / I put in

The ending -어 makes it casual, so this sounds like spoken Korean between friends, family, or in informal narration.

More polite versions would be:

• 넣었어요 = polite casual
• 넣었습니다 = formal

So this sentence has a natural conversational tone.

In Korean, 가위 usually refers to a pair of scissors as a single item.

That is different from English, where scissors looks plural.

So:

• 가위 in Korean behaves like a normal singular noun
• but in English, we usually translate it as scissors

That is why there is nothing unusual about 지우개랑 가위도 in Korean grammar.

Korean often puts background information first and the main action later.

So the sentence is structured like:

1. background/opportunity: while tidying the desk
2. main action: I also put the eraser and scissors in the drawer

This order is very natural in Korean because it sets up the situation before giving the main event.

So the sentence flows like:

• As I was tidying the desk,
• I also put the eraser and scissors in the drawer.

Yes. Both capture the idea well.

The key nuance of -는 김에 is not just simple timing like while, but also the feeling of:

• taking the chance
• doing an extra thing while already engaged in something

So natural English translations could be:

• While I was tidying the desk, I also put the eraser and scissors in the drawer.
• Since I was already cleaning up the desk, I went ahead and put the eraser and scissors in the drawer too.
• While I was at it, I put the eraser and scissors in the drawer too.

The last one often matches the nuance of 김에 especially well.