A cylindrical measuring cup with an inner diameter of 8 cm, the height of the liquid medicine inside is 16 cm, which accounts for just 4/5 of the capacity of the cup. If you want to fill up the liquid medicine, how many milliliters of liquid medicine can you add?
一只内直径为8厘米的圆柱形量杯，内装药水的高度为16厘米，恰占杯子容量的(4/5)，如果想加满药水，还可以加入药水多少毫升？
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3.14 * 16 * 16</gadget>
<output>803.84</output>

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

<gadget id="calculator">803.84 / (4/5)</gadget>
<output>1_004.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1_004.8 * (1/5)</gadget>
<output>200.96</output>

<result>200.96</result>