A roll of 600 meters long wire, 128 meters are used for the first time, and 178 meters are used for the second time, how many meters are left in this roll of wire?
一卷600米长的电线，第一次用去128米，第二次用去178米，这卷电线还剩多少米？
<gadget id="calculator">600 - 128 - 178</gadget>
<output>294</output>

<result>294</result>