The passenger car travels from A to B, and the truck travels from B to A. At the same time, when the bus travels (2/5) of the whole journey, the truck travels (1/3) of the whole journey. When the two vehicles meet, the distance from the midpoint is 20 kilometers Meters, how many kilometers is the whole journey?
客车从A地去B地，货车从B地去A地，同时，当客车行全程的(2/5)时，货车行全程的(1/3)，当两车相遇时距中点20千米，全程多少千米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (2/5) - (1/3)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">20 / (4/15)</gadget>
<output>75</output>

<result>75</result>