A train travels 55 kilometers from place A to place B in the first hour, and travels the whole distance (1/8) in the second hour. At this time, the train just arrives at the midpoint of the two places. What is the distance between places A and B? km?
一列火车从甲地到乙地，第一小时行了55千米，第二小时行了全程的(1/8)，这时列车正好到达两地的中点，那么甲、乙两地相距多少千米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/2) - (1/8)</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">55 / (3/8)</gadget>
<output>440/3 = around 146.666667</output>

<result>440/3 = around 146.666667</result>