There are 15 people in the first workshop of a children's clothing factory, and each person produces 4 sets of children's clothing per day on average. How many sets of children's clothing were produced in March?
某童装厂第一车间有15人，平均每人每天生产童装4套，三月份共生产童装多少套？
<gadget id="calculator">4 * 15 * 31</gadget>
<output>1_860</output>

<result>1_860</result>