You are given a math word problem and you are supposed to apply a single mathematical operator like addition, subtraction, multiplication, or division on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

he also made some juice from fresh oranges . if he used 2 oranges per glass of juice and he made 6 glasses of juice how many oranges did he use ?
12

some oranges were in the basket . 5 oranges were taken from the basket . now there are 3 oranges . how many oranges were in the basket before some of the oranges were taken ?
8

we ordered 21 pizzas . each pizza has 8 slices . how many slices of pizza are there altogether ?
168