{3/(2/(5(1/3)+2(8/15)))*□}/((4/5)*0.8)=59,□=how much.
{3/(2/(5(1/3)+2(8/15)))*□}/((4/5)*0.8)=59，□=多少．
<gadget id="calculator">16 / 5</gadget>
<output>16/5 = around 3.2</output>

<result>16/5 = around 3.2</result>