A wire is 350 meters long, 126 meters are used for the first time, and 207 meters are used for the second time, how many meters are left on this wire, and what is the correct formula
一根铁丝长350米，第一次用去126米，第二次用去207米，这根铁丝还剩下多少米，正确列式为多少
<gadget id="calculator">350 - 126 - 207</gadget>
<output>17</output>

<result>17</result>