From A to B, uphill roads account for 27%, flat roads account for 47%, and the rest are downhill roads. A car goes back and forth between A and B once, and travels a total of 53 kilometers downhill. How many kilometers is the distance between A and B?
从甲地到乙地，上坡路占27%，平路占47%，其余是下坡路．一辆汽车在甲乙两地往返一次，共行下坡路53千米，甲乙两地的路程是多少千米？
<gadget id="calculator">27 / 100</gadget>
<output>27/100 = around 0.27</output>

<gadget id="calculator">47 / 100</gadget>
<output>47/100 = around 0.47</output>

<gadget id="calculator">1 - (27/100) - (47/100)</gadget>
<output>13/50 = around 0.26</output>

<gadget id="calculator">(13/50) + (27/100)</gadget>
<output>53/100 = around 0.53</output>

<gadget id="calculator">53 / (53/100)</gadget>
<output>100</output>

<result>100</result>