The price of a certain fruit in the first week of October this year 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 has the price increased in the past two weeks?
某种水果今年10月第一周比上周涨价10%，第二周比第一周涨价10%．两周以来共涨价涨价多少
<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">(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>