jeosgaragi isseumyeon gimchireul meokgi pyeonhaeyo.

Because 있다 usually marks the thing that exists or is available with 이/가.

So 젓가락이 있으면 literally means if chopsticks exist / if chopsticks are available. In natural English, that often sounds like if you have chopsticks.

In everyday Korean, 젓가락 usually means chopsticks as a usable set.

If you specifically mean one stick, you would usually make that clearer from context or add something like 한 짝.

있으면 is 있다 + -으면, the conditional ending.

It means if there is/are, if you have, or sometimes when there is/are, depending on context.
Here, 젓가락이 있으면 means if there are chopsticks available or if you have chopsticks.

Good question. This sentence does not literally say with chopsticks. It says:

If chopsticks are available, eating kimchi is easy/convenient.

So the focus is on the availability of chopsticks, not directly on the tool marker -으로/로.

If you wanted to explicitly say with chopsticks, you could say something like:

젓가락으로 김치를 먹기 편해요.
or
젓가락으로 먹으면 편해요.

Because 김치 is the direct object of 먹다 (to eat), so it takes 을/를.

• 김치를 먹다 = to eat kimchi

Since 김치 ends in a vowel, it takes 를.

This uses the pattern:

verb stem + 기 + 편하다

Here:

• 먹다 → 먹기
• 편하다 = to be comfortable / convenient / easy

So 먹기 편해요 means it is easy/convenient to eat.

This is a very common Korean pattern for saying that something is easy or convenient to do.

Because -기 편하다 is a very common set pattern meaning easy/convenient to do.

So:

• 먹기 편해요 = it’s easy to eat

You may also hear things like 먹는 게 편해요, but that has a slightly different structure and feel. For this kind of general statement, -기 편하다 is the most standard and natural pattern.

The subject is omitted, which is very normal in Korean.

The sentence means something like:

• It is easy to eat kimchi if there are chopsticks
• You can eat kimchi easily if you have chopsticks

Korean often leaves out it, you, or people when the meaning is clear from context.

It can mean all of those depending on context.

In 먹기 편해요, the most natural English meaning is usually easy to eat or convenient to eat.
So here, comfortable is not the best translation.

편해요 is in the 해요 style, which is polite and very common in everyday conversation.

It is polite enough for many normal situations, but not the most formal style.

Compare:

• 편해요 = polite, everyday
• 편합니다 = more formal
• 편해 = casual, plain speech