Grandpa bought a box of candy, a total of 50. After distributing some to 3 children, I still have 11 left. How many candies does each child get on average?
爷爷买了一盒糖，一共50颗．分给3位小朋友一些后，自己还剩下11颗．平均每个小朋友分到多少颗糖？
<gadget id="calculator">50 - 11</gadget>
<output>39</output>

<gadget id="calculator">39 / 3</gadget>
<output>13</output>

<result>13</result>