Cars A and B start from AB at the same time and drive toward each other. Car A travels the whole distance (3/4), and Car B travels the whole distance (2/5). At this time, the distance between the two cars is 60 kilometers. How many kilometers away are the places?
甲、乙两车同时从AB两地出发相向而行，甲车行了全程的(3/4)，乙车行了全程的(2/5)，这时两车相距60千米，AB两地相距多少千米？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

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

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

<gadget id="calculator">(3/4) + (-3/5)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">60 / (3/20)</gadget>
<output>400</output>

<result>400</result>