A swallow eats 60 pests a day. According to this calculation, how many pests does this swallow eat in a week?
一只燕子，一天吃害虫60只，照这样计算，这只燕子一星期吃害虫多少只？
<gadget id="calculator">60 * 7</gadget>
<output>420</output>

<result>420</result>