A bottle of medicinal liquid contains 80% of the medicine, pour out (1/3) and then fill up with water, pour out (1/4) and still fill up with water, pour out (1/5) and then fill up with water , at this time, how much medicine does the liquid contain?
一瓶药液含药为80%，倒出(1/3)后再加满水，再倒出(1/4)后仍用水加满，再倒出(1/5)后还用水加满，这时药液含药为多少
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

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

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">8 * (2/3) * (3/4) * (4/5)</gadget>
<output>16/5 = around 3.2</output>

<gadget id="calculator">(16/5) / 10</gadget>
<output>8/25 = around 0.32</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(8/25) * 1</gadget>
<output>8/25 = around 0.32</output>

<result>8/25 = around 0.32</result>