A car and a truck drive from place A to place B at the same time. When the car reaches 1/2 of the journey, the truck is 54 kilometers away from place B. Continue to drive at this speed. When the car arrives at place B , (4/5) for the truck to complete the journey. How many kilometers are there between A and B?
一辆轿车和一辆卡车同时从甲地开往乙地，当轿车行到全程的(1/2)时，卡车离乙地54千米，照这样的速度继续行驶，当轿车到达乙地时，卡车行完全程的(4/5)．甲、乙两地相距多少千米？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/5) / 2</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">54 / (3/5)</gadget>
<output>90</output>

<result>90</result>