A dragonfly can eat 45 mosquitoes a day, and a frog can eat 504 mosquitoes a week. How many more mosquitoes can a frog eat per day than a dragonfly?
蜻蜓每天能吃45只蚊子，青蛙一周能吃504只蚊子，青蛙比蜻蜓每天多吃多少只蚊子？
<gadget id="calculator">504 / 7</gadget>
<output>72</output>

<gadget id="calculator">72 - 45</gadget>
<output>27</output>

<result>27</result>