Three little swallows eat 720 pests in 4 days, how many pests does each swallow eat per day?
3只小燕子4天共吃害虫720只，平均每只燕子每天吃害虫多少只？
<gadget id="calculator">720 / 4 / 3</gadget>
<output>60</output>

<result>60</result>