Mom bought 3 boxes of apples, each weighing 13 kilograms, and the total cost was 234 yuan. How much is the average price per kilogram?
妈妈买了3箱苹果，每箱13千克，一共用了234元，平均每千克多少元？
<gadget id="calculator">13 * 3</gadget>
<output>39</output>

<gadget id="calculator">234 / 39</gadget>
<output>6</output>

<result>6</result>