Uncle Zhang started from home and went to the county seat by bicycle to do business. He traveled the entire distance (1/5) in the first hour and the rest (1/2) in the second hour. It is known that the second hour is more than the first hour Traveling 6 kilometers, how many kilometers is the distance from Uncle Zhang's home to the county?
张叔叔从家出发，骑自行驶车去县城办事，第一小时行了全程的(1/5)，第二小时行了余下的(1/2)，已知第二小时比第一小时多行6千米，张叔叔家距县城多少千米？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(4/5) * (1/2)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) - (1/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">6 / (1/5)</gadget>
<output>30</output>

<result>30</result>