The fruit shop shipped 10 baskets of apples and 20 baskets of pears, weighing a total of 800 kg. Each basket of apples weighs 20 kilograms, how many kilograms does each basket of pears weigh? (solution by equation)
水果店运来10筐苹果和20筐梨，一共重800千克．每筐苹果重20千克，每筐梨重多少千克？(用方程解)
<gadget id="calculator">10 * 20</gadget>
<output>200</output>

<gadget id="calculator">800 - 200</gadget>
<output>600</output>

<gadget id="calculator">600 / 20</gadget>
<output>30</output>

<result>30</result>