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.

Input: Consider Input: todd has some gum . steve gave him 16 more pieces of gum . now todd has 54 pieces of gum . how many pieces did todd have to start with ?

Output: 38

Input: Consider Input: martha bought 18 small cakes . she has 3 children . she would like to divide the cakes among her children so that each child gets the same amount . how many cakes would each child get ?

Output: 6

Input: Consider Input: at the river 25 out of 55 salmon families went to warmer waters to avoid being frozen . how many salmon families were left in the river ?
Output: 30