Mother bought 18 apples in the fruit shop, Xiaogang ate 3, and mother ate 7, how many apples are left?
妈妈在水果店里买了18个苹果，小刚吃了3个，妈妈吃了7个，还剩多少个苹果．
<gadget id="calculator">18 - 3 - 7</gadget>
<output>8</output>

<result>8</result>