A woodpecker eats 516 pests in 6 days, and a frog eats 728 pests in 7 days. Who eats more every day? How many more?
啄木鸟6天要吃516只害虫，青蛙7天要吃728只害虫，谁每天吃的多？多几只？
<gadget id="calculator">728 / 7</gadget>
<output>104</output>

<gadget id="calculator">516 / 6</gadget>
<output>86</output>

<gadget id="calculator">104 - 86</gadget>
<output>18</output>

<result>18</result>