Each set of desks and chairs can seat 2 people. The school bought 200 sets of desks and chairs. How many people can it seat in total?
每套课桌椅可以坐2个人，学校新买来200套课桌椅，一共可以坐多少人？
<gadget id="calculator">200 * 2</gadget>
<output>400</output>

<result>400</result>