The fruit store shipped 25 boxes of apples and 34 boxes of pears, weighing 2020 kg in total, and each box of pears weighed 30 kg. How many kilograms does each box of apples weigh?
水果商店运来25箱苹果和34箱梨，共重2020千克，每箱梨重30千克．每箱苹果重多少千克？
<gadget id="calculator">30 * 34</gadget>
<output>1_020</output>

<gadget id="calculator">2_020 - 1_020</gadget>
<output>1_000</output>

<gadget id="calculator">1_000 / 25</gadget>
<output>40</output>

<result>40</result>