It took Wang Ming 30 days to read a 450-page "Fairy Tale Collection". It also took Li Hong 30 days to read a 360-page "Fairy Tale Collection". How many more pages does Wang Ming read every day than Li Hong?
王明看一本450页的《童话集》，用了30天．李红看一本360页的《童话集》也用了30天．王明比李红每天多看几页？
<gadget id="calculator">450 / 30</gadget>
<output>15</output>

<gadget id="calculator">360 / 30</gadget>
<output>12</output>

<gadget id="calculator">15 - 12</gadget>
<output>3</output>

<result>3</result>