题目

A businessman, with a large amount of money, was walking through a remote (偏远的) area. Upon    56    this, a thief followed him, planning to    57    his money at a certain time. The businessman noticed something was    58   , and he started to pay much more    59    to the thief. The businessman soon asked the thief if he   60    help find some water nearby, and when the thief went to    61    the water, the businessman put all of his    62    into the thief’s bag. Then the thief returned and told the businessman    63    the water东关小学三年级有3个班，平均每班40人，每人发5个作业本，一共需要多少个作业本？