kono dentaku o tsukaeba, daikin no keisan ga sugu dekimasu.

If you use this calculator, you can calculate the price right away.

Breakdown of kono dentaku o tsukaeba, daikin no keisan ga sugu dekimasu.

• を: direct object particle
• が: subject particle
• の: possessive case particle
• 使つかう: to use

Questions & Answers about kono dentaku o tsukaeba, daikin no keisan ga sugu dekimasu.

What exactly does 使えば mean here?

使えば is the -ba conditional form of 使う (to use).

• 使う → dictionary form
• 使えば → if you use / when you use

So この電卓を使えば means if you use this calculator.

This form often sounds a little like presenting a condition that makes something possible:

• このボタンを押せば、ドアが開きます。
  • If you press this button, the door opens.

In your sentence, it sets up the condition for the second part:

• If you use this calculator, you can quickly calculate the amount due.

Why is it 電卓を使えば but 計算ができます? Why を in one place and が in the other?