A frog eats 50 pests a day. According to this calculation, how many pests will 7 frogs eat in 2 days?
一只青蛙一天吃50只害虫，照这样计算，7只青蛙2天吃多少只害虫．
<gadget id="calculator">50 * 7 * 2</gadget>
<output>700</output>

<result>700</result>