There are 8 tons of apples, 3000 kg are removed, how many kg are left?
有8吨苹果，运走3000千克，还剩多少千克．
<gadget id="calculator">8 * 1_000</gadget>
<output>8_000</output>

<gadget id="calculator">8_000 - 3_000</gadget>
<output>5_000</output>

<result>5_000</result>