dragonfly eats 48 pests in 4 days. According to this calculation, how many pests can it eat in a week?
一只蜻蜓4天吃48条害虫，照这样计算，一星期可以吃多少条害虫？
<gadget id="calculator">48 / 4</gadget>
<output>12</output>

<gadget id="calculator">12 * 7</gadget>
<output>84</output>

<result>84</result>