Dad bought 4 watermelons, each weighing 10 kilograms, and mother bought 2 watermelons, each weighing 4 kilograms. What is the average weight of each of the 6 watermelons bought by Dad and Mom? How many
爸爸买了4个西瓜，每个重10千克，妈妈买了2个西瓜，每个重4千克，爸爸和妈妈买的6个西瓜平均每个重多少千克？多少
<gadget id="calculator">4 * 10</gadget>
<output>40</output>

<gadget id="calculator">2 * 4</gadget>
<output>8</output>

<gadget id="calculator">40 + 8</gadget>
<output>48</output>

<gadget id="calculator">2 + 4</gadget>
<output>6</output>

<gadget id="calculator">48 / 6</gadget>
<output>8</output>

<result>8</result>