The road construction team repaired a road, and built (1/5) of the full length on the first day, and (3/4) kilometers on the second day, leaving 2.05 kilometers left. How long is this road in kilometers? (solution with equation)
筑路队修一条公路，第一天修了全长的(1/5)，第二天修了(3/4)千米，还剩2.05千米．这条路全长多少千米？(用方程解答)
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) + 2.05</gadget>
<output>2.8</output>

<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">2.8 / (4/5)</gadget>
<output>3.5</output>

<result>3.5</result>