If the side length of a square increases by 10%, how much does its perimeter increase?
一个正方形的边长增加10%，那么它的周长增加多少．
<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 * 4</gadget>
<output>4</output>

<gadget id="calculator">(11/10) * 4</gadget>
<output>22/5 = around 4.4</output>

<gadget id="calculator">(22/5) - 4</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) / 4</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>