A pile of sand weighs (4/5) tons, and (1/6) is used up every day, and ((())/(())) is spent on this pile of sand in 5 days. How many tons of sand will be used in 5 days?
一堆沙重(4/5)吨，每天用去(1/6)，5天一共用去这堆沙的((())/(()))．5天一共用去多少吨沙．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(4/5) * (1/6) * 5</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>