It takes 5 minutes for each student to make a windmill, how many minutes does it take for 5 students to fold 10 windmills at the same time?
每个同学做一个风车要用5分钟，5个同学同时折10个风车要用多少分钟．
<gadget id="calculator">10 / 5</gadget>
<output>2</output>

<gadget id="calculator">2 * 5</gadget>
<output>10</output>

<result>10</result>