A car drives from place A to place B. It travels the entire distance (1/3) in the first hour. At this time, it is still 40 kilometers away from the midpoint. How many kilometers is the distance between places A and B?
一辆汽车从甲地开往乙地，第一小时行了全程的(1/3)，这时离中点还有40千米，甲乙两地的距离是多少千米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

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

<gadget id="calculator">(1/2) - (1/3)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">40 / (1/6)</gadget>
<output>240</output>

<result>240</result>