30 baskets of apples are shipped from the fruit shop, each basket is 20 kilograms, and how many kilograms are transported is exactly 1 ton.
水果店里运来30筐苹果，每筐20千克，再运多少千克正好是1吨．
<gadget id="calculator">1 * 1_000</gadget>
<output>1_000</output>

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

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

<result>400</result>