The supermarket shipped 5,000 kilograms of fruit and sold 4 tons. How many kilograms of fruit are left?
超市运来5000千克水果，卖了4吨，还剩多少千克水果？
<gadget id="calculator">4 * 1_000</gadget>
<output>4_000</output>

<gadget id="calculator">5_000 - 4_000</gadget>
<output>1_000</output>

<result>1_000</result>