A fruit shop ships 20 baskets of apples and 20 pears each. Each box of apples weighs 15 kg, and each box of pears weighs 25 kg. How many kilograms are the apples and pears delivered in total?
水果店运来苹果和梨各20筐，苹果每箱重15千克，梨每筐重25千克．运来的苹果和梨一共多少千克？
<gadget id="calculator">15 * 20</gadget>
<output>300</output>

<gadget id="calculator">25 * 20</gadget>
<output>500</output>

<gadget id="calculator">300 + 500</gadget>
<output>800</output>

<result>800</result>