The engineering team repaired a road, and repaired the full length (1/5) in the first month, and repaired the remaining 75% in the second month, leaving 1.5 km to be repaired. How many kilometers is the total length of this road?
工程队修一条公路，第一个月修了全长的(1/5)，第二个月修了剩下的75%，还剩1.5km没有修，这条公路全长多少千米？
<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">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) * (4/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(4/5) - (3/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1.5 / (1/5)</gadget>
<output>7.5</output>

<result>7.5</result>