A woodpecker can eat 625 pests in one day, and a frog can eat 420 pests in 5 days. How many fewer pests does a frog eat per day than a woodpecker?
啄木鸟一天能吃625只害虫，青蛙5天能吃420只害虫．青蛙每天比啄木鸟少吃多少只害虫？
<gadget id="calculator">420 / 5</gadget>
<output>84</output>

<gadget id="calculator">625 - 84</gadget>
<output>541</output>

<result>541</result>