There is a road that is 8000 meters long, and a road repair team is 250 meters per day. After 20 days of repairing, how many meters are left?
有一条路长8000米，一个修路队每天250米，修20天后，还剩多少米？
<gadget id="calculator">250 * 20</gadget>
<output>5_000</output>

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

<result>3_000</result>