A bundle of wires is 1000 meters long, and 700 meters have been used. How much less rice is left than used?
一捆电线长1000米，用去了700米．剩下的比用去的少多少米？
<gadget id="calculator">1_000 - 700</gadget>
<output>300</output>

<gadget id="calculator">700 - 300</gadget>
<output>400</output>

<result>400</result>