3 pears, each weighing 256 grams on average; 5 apples, each weighing 280 grams on average. How many grams do these fruits weigh on average?
3个梨，平均每个重256克；5个苹果，平均每个重280克．这些水果平均每个重多少克？
<gadget id="calculator">256 * 3</gadget>
<output>768</output>

<gadget id="calculator">280 * 5</gadget>
<output>1_400</output>

<gadget id="calculator">768 + 1_400</gadget>
<output>2_168</output>

<gadget id="calculator">3 + 5</gadget>
<output>8</output>

<gadget id="calculator">2_168 / 8</gadget>
<output>271</output>

<result>271</result>