The price of a product in the first week of March is 10% higher than that of last week, and the price of the second week is 10% higher than that of the first week. How much is the total price increase in two weeks?
一件商品3月的第一周比上周涨价10%，第二周比第一周涨价10%，两周一共涨价多少
<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">1 * (11/10) * (11/10)</gadget>
<output>121/100 = around 1.21</output>

<gadget id="calculator">(121/100) - 1</gadget>
<output>21/100 = around 0.21</output>

<result>21/100 = around 0.21</result>