A bundle of wires is 900 meters long, 220 meters are used for the first time, and 480 meters are used for the second time, how many meters are left?
一捆电线长900米，第一次用去220米，第二次用去480米，还剩多少米．
<gadget id="calculator">900 - 220 - 480</gadget>
<output>200</output>

<result>200</result>