A store buys a batch of tea leaves at a profit rate of 30%. When 80% of the tea leaves are sold out, the remaining tea leaves are sold at half the price. What is the actual profit percentage after the tea leaves are sold out?
某商店进一批茶叶按30%的利润率定价，当卖出80%以后，为尽早销完，剩余的按定价一半出售，这批茶叶全卖完后实际获利百分数是多少？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 + (3/10)</gadget>
<output>13/10 = around 1.3</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 * (13/10) * (4/5)</gadget>
<output>26/25 = around 1.04</output>

<gadget id="calculator">(13/10) / 2</gadget>
<output>13/20 = around 0.65</output>

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

<gadget id="calculator">1 * (13/20) * (1/5)</gadget>
<output>13/100 = around 0.13</output>

<gadget id="calculator">(26/25) + (13/100)</gadget>
<output>117/100 = around 1.17</output>

<gadget id="calculator">(117/100) - 1</gadget>
<output>17/100 = around 0.17</output>

<result>17/100 = around 0.17</result>