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.

Gavin has 23 shirts . 6 are blue the rest are green . How many green shirts does Gavin have ?
17

There are 7 crayons in the drawer . Mary took 3 crayons out of the drawer . How many crayons are there now ?
4

A restaurant served 6 cakes during lunch and 9 during dinner today . How many cakes were served today ?

15