A car drives from place A to place B for the whole journey (5/12). At this time, there is still 40km away from the midpoint. How many kilometers is the distance between places A and B?
一辆小汽车从甲地开往乙地，行了全程的(5/12)，这时距离中点还有40km，问甲、乙两地相距多少千米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">(1/2) - (5/12)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">40 / (1/12)</gadget>
<output>480</output>

<result>480</result>