A supermarket brings in 3 tons of rice and sells 2,500 kilograms in 5 days. How many kilograms are left?
一个超市运进3吨大米，5天卖出了2500千克，还剩下多少千克？
<gadget id="calculator">3 * 1_000</gadget>
<output>3_000</output>

<gadget id="calculator">3_000 - 2_500</gadget>
<output>500</output>

<result>500</result>