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

[Q]: Professor Ellison weighed 2 pieces of metal for an experiment . The piece of iron weighed 11.166666666666666 pounds and the piece of aluminum weighed 0.8333333333333334 pound . How much more did the piece of iron weigh than the piece of aluminum ?
[A]: 10.333333333333334

[Q]: Iesha has 58 books . 19 are about school and the rest are about sports . How many books about sports does Iesha have ?
[A]: 39

[Q]: Mary got fast food for lunch . Mary spent $ 1.08 on soup and $ 4.8 on a salad . Mary paid with a 20 dollar bill . What was the total of the lunch bill ?
[A]:
5.88