Lele went from home to the park to play. After walking the whole journey (3/8), there is still 0.5 kilometers away from half of the journey. How many kilometers is the distance from his home to the park?
乐乐从家里到公园去玩，行了全程的(3/8)后，距离全程的一半还有0.5千米，他家到公园的距离是多少千米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(1/2) - (3/8)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">0.5 / (1/8)</gadget>
<output>4</output>

<result>4</result>