The price of a stock rises by 10%, then rises by 15%, and then falls by 20%, how much does the stock's price increase compared to the original
一支股票的价格上升10%后又上升15%，然后下降20%，这支股票的价格和原来相比上升多少
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 + (3/20)</gadget>
<output>23/20 = around 1.15</output>

<gadget id="calculator">20 / 100</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">1 * (11/10) * (23/20) * (4/5)</gadget>
<output>253/250 = around 1.012</output>

<gadget id="calculator">(253/250) - 1</gadget>
<output>3/250 = around 0.012</output>

<gadget id="calculator">(3/250) / 1</gadget>
<output>3/250 = around 0.012</output>

<result>3/250 = around 0.012</result>