The grain store shipped 2 tons of rice and sold 600 kilograms. How many kilograms are left?
粮店运来2吨大米，已经卖出600千克，还剩多少千克？
<gadget id="calculator">2 * 1_000</gadget>
<output>2_000</output>

<gadget id="calculator">2_000 - 600</gadget>
<output>1_400</output>

<result>1_400</result>