If the side length of a 10 cm square is increased by 25%, by what percentage is the area increased?
将边长是10厘米的正方形的边长增加25%，面积增加百分之几？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">10 * (5/4)</gadget>
<output>25/2 = around 12.5</output>

<gadget id="calculator">(25/2) * (25/2)</gadget>
<output>625/4 = around 156.25</output>

<gadget id="calculator">10 * 10</gadget>
<output>100</output>

<gadget id="calculator">(625/4) - 100</gadget>
<output>225/4 = around 56.25</output>

<gadget id="calculator">(225/4) / 100</gadget>
<output>9/16 = around 0.5625</output>

<result>9/16 = around 0.5625</result>