train passes through a 200-meter-long tunnel at a speed of 36 kilometers per hour for 31 seconds, and then passes through a second tunnel at the same speed for 29 seconds. How many meters is the second tunnel?
一列火车以每小时36公里的速度通过一条长为200米的隧道，共用了31秒，接着又以同样的速度用29秒的时间通过第二条隧道．第二条隧道有多少米．
<gadget id="calculator">29 * 10</gadget>
<output>290</output>

<gadget id="calculator">31 * 10</gadget>
<output>310</output>

<gadget id="calculator">310 - 200</gadget>
<output>110</output>

<gadget id="calculator">290 - 110</gadget>
<output>180</output>

<result>180</result>