(1/5)+(4/5)/(16/75)*(8/25).
(1/5)+(4/5)/(16/75)*(8/25)．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">16 / 75</gadget>
<output>16/75 = around 0.213333</output>

<gadget id="calculator">(4/5) / (16/75)</gadget>
<output>15/4 = around 3.75</output>

<gadget id="calculator">8 / 25</gadget>
<output>8/25 = around 0.32</output>

<gadget id="calculator">(15/4) * (8/25)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">(1/5) + (6/5)</gadget>
<output>7/5 = around 1.4</output>

<result>7/5 = around 1.4</result>