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.

Eugene has 51 pencils . He gets 6 more from Joyce . How many pencils does Eugene have in all ?
57

Before December , customers buy 1346 ear muffs from the mall . During December , they buy 6444 more , and there are none left . In all , how many ear muffs do the customers buy ?
7790

There are 40 boys and some girls on the playground . There are 117 children altogether . How many girls are on the playground ?

77