Mom bought 17 apples and ate 3 apples a day for 5 days, how many are left?
妈妈买了17个苹果，每天吃3个，吃了5天，还剩多少个？
<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<gadget id="calculator">17 - 15</gadget>
<output>2</output>

<result>2</result>