A set of children's books sells for 63 yuan. There are 37 students in class 3 and 1, and each of them has a book. How much is the total cost?
一套儿童读物卖63元，三1班有37名学生，每人一本，共需多少元．
<gadget id="calculator">63 * 37</gadget>
<output>2_331</output>

<result>2_331</result>