The engineering team has to lay (4/5) km of natural gas pipelines, and the full length (1/3) was laid in 4 days. How many miles per day on average? (using the equation method)
工程队要铺(4/5)km的天然气管道，4天铺了全长的(1/3)．平均每天铺多少千米？(用方程法)
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(4/5) * (1/3)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">(4/15) / 4</gadget>
<output>1/15 = around 0.066667</output>

<result>1/15 = around 0.066667</result>