The average weight of each apple is 145 grams, 50 apples are packed in a box, and the box weighs 8 kg. How many grams does the box weigh?
平均每个苹果重145克，50个苹果装一箱，和箱子共重8千克．箱子重多少克？
<gadget id="calculator">8 * 1_000</gadget>
<output>8_000</output>

<gadget id="calculator">145 * 50</gadget>
<output>7_250</output>

<gadget id="calculator">8_000 - 7_250</gadget>
<output>750</output>

<result>750</result>