If the side length of a square increases by (1/5), then its area will increase by ((())/(())).
如果一个正方形边长增加(1/5)，那么它的面积将增加((())/(()))．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">(6/5) * (6/5)</gadget>
<output>36/25 = around 1.44</output>

<gadget id="calculator">1 * 1</gadget>
<output>1</output>

<gadget id="calculator">(36/25) - 1</gadget>
<output>11/25 = around 0.44</output>

<gadget id="calculator">(11/25) / 1</gadget>
<output>11/25 = around 0.44</output>

<result>11/25 = around 0.44</result>