The construction team repaired a road, and repaired (2/5) of the full length in 4 days, and repaired (3/5) kilometers per day on average. How many kilometers is the total length of this road?
工程队修一条路，4天修了全长的(2/5)，平均每天修(3/5)千米，这条路全长多少千米？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">4 / (2/5)</gadget>
<output>10</output>

<gadget id="calculator">(3/5) * 10</gadget>
<output>6</output>

<result>6</result>