After the price of a product has increased by 10%, the price has increased by 15%, and now the price has been reduced by 20%, what percentage is the current price of this product? How many.
一件商品涨价10%后，又涨价15%，现在降价20%，这商品现在价格是原来的百分之几？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>253/250 = around 1.012</output>

<result>253/250 = around 1.012</result>