The little monkey said: "I picked 30 corns", the little bear said: "I picked 40 corns", and the little squirrel said: "How many corns did the little monkey pick less than the little bear"?
小猴说："我摘了30个玉米"，小熊说："我摘了40个呢"，小松鼠说："小猴比小熊少摘了多少个玉米"？
<gadget id="calculator">40 - 30</gadget>
<output>10</output>

<result>10</result>