It takes 22 seconds for a train to cross an 82-meter iron bridge. If the speed of the train is doubled, it will take 50 seconds to pass through a 706-meter iron bridge. How long is the train in meters?
某列火车通过长为82米的铁桥用了22秒，如果火车的速度加快一倍，它通过706米的铁桥就用50秒，那么火车的长度是多少米？
<gadget id="calculator">706 / 100</gadget>
<output>353/50 = around 7.06</output>

<gadget id="calculator">82 / 22</gadget>
<output>41/11 = around 3.727273</output>

<gadget id="calculator">(353/50) - (41/11)</gadget>
<output>1_833/550 = around 3.332727</output>

<gadget id="calculator">1 / 22</gadget>
<output>1/22 = around 0.045455</output>

<gadget id="calculator">1 / 100</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">(1/22) - (1/100)</gadget>
<output>39/1_100 = around 0.035455</output>

<gadget id="calculator">(1_833/550) / (39/1_100)</gadget>
<output>94</output>

<result>94</result>