Imagine a question and stream-of-consciousness explanation for which this is the answer: 15
Question: Julia has $40. She spends half of her money to buy a new game for her phone. She spends a quarter of what she has left on in-game purchases. How much money does she have left?
Stream-of-consciousness: Julia spend $40 / 2 = $20 on the game. After buying the game, she has $40 - $20 = $20 left. She spent $20 / 4 = $5 on in - game purchases. She has $20 - $5 = $15 left.