A car travels from place A to place B. The ratio of the distance it has traveled to the whole journey is 1:3. After driving 65 kilometers, the car will just reach the midpoint of the two places. How many kilometers are there between A and B?
一辆汽车从甲地到乙地，现在已行驶的路程与全程的比是1：3，再行驶65千米，汽车正好行驶到两地的中点．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 / 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">65 / (1/6)</gadget>
<output>390</output>

<result>390</result>