passenger car travels from A to B and arrives in 20 hours. A freight train travels from B to A and arrives in 24 hours. Now the two trains depart from A and B at the same time. There are 636 kilometers, how many kilometers are there between A and B? (column solution)
一辆客车从甲地开往乙地，20小时到达，一列货车从乙地开往甲地，24小时可到达，现在两列车同时从甲乙两地同时相对开出，相遇时货车距甲地还有636千米，求甲乙两地相距多少千米？(列式解答)
<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 / 24</gadget>
<output>1/24 = around 0.041667</output>

<gadget id="calculator">(1/20) + (1/24)</gadget>
<output>11/120 = around 0.091667</output>

<gadget id="calculator">1 / (11/120)</gadget>
<output>120/11 = around 10.909091</output>

<gadget id="calculator">636 / (120/11)</gadget>
<output>583/10 = around 58.3</output>

<gadget id="calculator">(583/10) * 20</gadget>
<output>1_166</output>

<result>1_166</result>