It took a train 23 seconds to cross the 450-meter-long iron bridge, and 8 seconds to pass a railway worker standing beside the railway. What is the length of this train?
一列火车通过450米长的铁桥用了23秒，经过一位站在铁路旁的铁路工人身旁用了8秒．这列火车的车身长是多少米．
<gadget id="calculator">450 / 23</gadget>
<output>450/23 = around 19.565217</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 / 23</gadget>
<output>1/23 = around 0.043478</output>

<gadget id="calculator">(1/8) - (1/23)</gadget>
<output>15/184 = around 0.081522</output>

<gadget id="calculator">(450/23) / (15/184)</gadget>
<output>240</output>

<result>240</result>