A highway is (4/5) kilometers long. 25% of the total length was repaired on the first day, and (1/5) of the total length was repaired on the second day. How many kilometers more were repaired on the first day than on the second day?
一条公路长(4/5)千米，第一天修了全长的25%，第二天修了全长的(1/5)，第一天比第二天多修了多少千米？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 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">(4/5) * (1/20)</gadget>
<output>1/25 = around 0.04</output>

<result>1/25 = around 0.04</result>