Mom bought some pears and 6 apples, and ate 4 pears, leaving twice as many pears as apples. How many pears did she buy?
妈妈买来一些梨和6个苹果，吃了4个梨，剩下的梨是苹果的2倍，妈妈买了多少个梨．
<gadget id="calculator">6 * 2</gadget>
<output>12</output>

<gadget id="calculator">12 + 4</gadget>
<output>16</output>

<result>16</result>