I'll give you a question, please answer with step-by-step reasoning process.
Raul had $87 to spare so he decided to go to the bookshop. Raul bought 8 comics, each of which cost $4. How much money does Raul have left?

55
He spent 8 comics × $4 / comic = $32 on comics.

Raul has $87 - $32 = $55 left.

.

So, the answer is 55