rope is 2 kilometers long, 800 meters are cut for the first time, and 700 meters are cut for the second time, how many meters are left with the rope?
一根绳子长2千米，第一次截取了800米，第二次截取了700米，这跟绳子还剩下多少米？
<gadget id="calculator">2 * 1_000</gadget>
<output>2_000</output>

<gadget id="calculator">800 + 700</gadget>
<output>1_500</output>

<gadget id="calculator">2_000 - 1_500</gadget>
<output>500</output>

<result>500</result>