From home to the park, Xiaohong just arrived at the Children's Palace when he walked 80% of the whole journey. He returned from the park along the original road. How many kilometers is the distance to the park?
小红从家到公园，走了全程的80%时正好到达少年宫，他从公园沿原路返回，行了全程的(1/4)时，就过少年宫(3/5)千米，他家到公园的路程是多少千米？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/4) - (1/5)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(3/5) / (1/20)</gadget>
<output>12</output>

<result>12</result>