The park paved (4/5) hectares of lawn, and paved its (1/4) in four days. How many hectares are paved per day on average?
公园铺(4/5)公顷的草坪，四天铺了它的(1/4)．平均每天铺多少公顷？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) / 4</gadget>
<output>1/16 = around 0.0625</output>

<gadget id="calculator">(4/5) * (1/16)</gadget>
<output>1/20 = around 0.05</output>

<result>1/20 = around 0.05</result>