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.

ben was also given 7 trays of eggs to examine . if each tray has 10 eggs how many eggs did ben examine in total ?
70

billy had 72 lemon heads . if billy gave equal numbers of lemon heads to his 6 friends how many lemon heads did each person eat ?
12

olivia 's dad took her and some friends out to eat for her birthday . if each meal costs 7 dollars and her dad paid for 3 meals how much did he spend ?

21