On Sunday, Yangyang went to Nanhu Park to play. After completing (3/8) of the whole journey, there is still (1/2) kilometers left for half of the whole journey. How many kilometers is the distance from his home to Nanhu Park?
星期天，阳阳到南湖公园玩．行了全程的(3/8)后，距离全程的一半还有(1/2)千米．他家到南湖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">(1/2) / (1/8)</gadget>
<output>4</output>

<result>4</result>