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.
Q: mike found 62 seashells on the beach he gave tom some of his seashells . he has 13 seashell left . how many seashells did he give to tom ?
A: 
49