A passenger car and a truck drive towards each other from places A and B at the same time, and meet at a distance of 6 kilometers from the midpoint. It is known that the speed of the truck is (4/5) that of the passenger car. How many kilometers are there between places A and B?
客车和货车同时从甲、乙两地相向而行，在距中点6千米处相遇，已知货车速度是客车的(4/5)，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 + 4</gadget>
<output>9</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">(1/2) - (4/9)</gadget>
<output>1/18 = around 0.055556</output>

<gadget id="calculator">6 / (1/18)</gadget>
<output>108</output>

<result>108</result>