A car drives from place A to place B. It travels 75 kilometers in the first hour, and travels the whole distance (1/3) in the second hour. At this time, it exceeds the midpoint of 30 kilometers. How many kilometers is the distance between places A and B?
一辆汽车从甲地开往乙，第一小时行了75千米，第二小时行了全程的(1/3)，这时超过中点30千米，甲乙两地相距多少千米？
<gadget id="calculator">75 - 30</gadget>
<output>45</output>

<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">45 / (1/6)</gadget>
<output>270</output>

<result>270</result>