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 - 82</gadget>
<output>624</output>

<gadget id="calculator">50 * 2</gadget>
<output>100</output>

<gadget id="calculator">100 - 22</gadget>
<output>78</output>

<gadget id="calculator">624 / 78</gadget>
<output>8</output>

<gadget id="calculator">8 * 22</gadget>
<output>176</output>

<gadget id="calculator">176 - 82</gadget>
<output>94</output>

<result>94</result>