A bundle of wires is 200 meters long, 30 meters are used for the first time, and 3 times the amount of meters used for the second time, how many meters are left in the bundle of wires?
一捆电线长200米，第一次用去30米，第二次用去的米数是第一次的3倍，这捆电线还剩下多少米？
<gadget id="calculator">30 * 3</gadget>
<output>90</output>

<gadget id="calculator">200 - 30 - 90</gadget>
<output>80</output>

<result>80</result>