The bus and the truck drive from A to B at the same time. When the bus travels the whole distance (2/5), the truck travels 120 kilometers. When the bus arrives at B, the truck travels the whole distance (3/4). How many kilometers are there between A and B?
客车与货车同时从甲开往乙，当客车行了全程的(2/5)时，货车行了120千米，当客车到达乙地时，货车行了全程的(3/4)．甲乙两地相距多少千米．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(2/5) * (3/4)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">120 / (3/10)</gadget>
<output>400</output>

<result>400</result>