[Question]: Amy's grandfather gave her $100 for her birthday. Amy bought 3 dolls, each of which cost $1. How much money does Amy have left?
[Answer]: The cost of the dolls is 3 × $1 = $3. Amy has $100 − $3 = $97 left.
So the answer is 97.

[Question]: Miles is going to spend 1/6 of a day reading. He will read comic books, graphic novels, and novels. He reads 21 pages an hour when he reads novels, 30 pages an hour when he reads graphic novels, and 45 pages an hour when he reads comic books. If he reads each for 1/3 of his time, how many pages does he read?
[Answer]: Miles will read for 4 hours because 24 x (1 / 6) = 4. He will read each type for 1 and 1 / 3 hours because 4 / 3 = 1 and 1 / 3. He will read 28 pages of novels because 21 x (1 and 1 / 3) = 28. He will read 40 pages of graphic novels because 30 x (1 and 1 / 3) = 40. He will read 60 pages of comic books because 45 x (1 and 1 / 3) = 60. He will read 128 pages in total because 28 + 40 + 60 = 128.
So the answer is 128.

[Question]: Mohammad has 80 bags of chips. One quarter of the bags of chips are Doritos. If Mohammad wants to split the bags of Doritos into 4 equal piles, how many bags of Doritos will be in each pile?
[Answer]:
The number of Dorito bags is 80 / 4 = 20 bags. The number of Dorito bags in each pile is 20 / 4 = 5 bags.
So the answer is 5.