Xiaoxin has 30 more cartoons than Xiaosi, and how many cartoons Xiaoxin gives to Xiaosi, their cartoons will be the same.
小新比小思多30张卡通画片，小新给小思多少张，他们的卡通画片就一样了．
<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<result>15</result>