The store shipped 1 ton of fruit, of which apples weighed 600 kg, and the rest were pears. How many kilograms does a pear weigh?
商店运来1吨水果，其中苹果重600千克，其余的都是梨．梨重多少千克？
<gadget id="calculator">1 * 1_000</gadget>
<output>1_000</output>

<gadget id="calculator">1_000 - 600</gadget>
<output>400</output>

<result>400</result>