It takes 2 minutes for a train to cross a 200-meter-long bridge at a speed of 180 meters per minute (from when the front of the train enters the bridge until the rear of the train leaves the bridge). How many meters is the body length of this train?
一列火车以每分钟180米的速度穿过一条长200米的大桥(从车头开进桥面直至车尾离开桥面)用2分钟，求这列火车的车身长多少米？
<gadget id="calculator">180 * 2</gadget>
<output>360</output>

<gadget id="calculator">360 - 200</gadget>
<output>160</output>

<result>160</result>