The engineering team planned to build a canal (5/6) kilometers long, and completed (1/5) of it in 4 days. How many kilometers are repaired per day on average.
工程队计划修一条长(5/6)千米的水渠，4天修了它的(1/5)．平均每天修多少千米．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">4 / (1/5)</gadget>
<output>20</output>

<gadget id="calculator">6.5 / 20</gadget>
<output>0.325</output>

<result>0.325</result>