Increase the length of two perpendicular sides of a square by (1/4) to obtain a new square whose area is ((())/(())) larger than the area of the original square.
把一个正方形互相垂直的两条边的边长增加(1/4)，得到一个新的正方形，这个新正方形的面积比原来正方形面积增加((())/(()))．
<gadget id="calculator">25 - 16</gadget>
<output>9</output>

<gadget id="calculator">9 / 16</gadget>
<output>9/16 = around 0.5625</output>

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