You are given a math word problem and you are supposed to apply multiple mathematical operators 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.

a store had 3 packs of paper for $ 3.87 . how much would it cost if you were to buy 6 packs ?
7.74

edward had 763 baseball cards in 7 binders . if each binder has the same number of cards how many cards are in each binder ?
109

our watermelons have 100 seeds each . if we have 4 watermelons how many seeds should there be when all seeds are taken out of the watermelons ?
400