If one side of a square is increased by 25% and the other side is decreased by 1.6 meters, a rectangle is obtained which has the same area as the original square. So, what is the area of the square.
把一个正方形的一边增加25%，另一边减少1.6米，就得到一个长方形，它与原来正方形的面积相等．那么，正方形的面积是多少．
<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">1 / (5/4)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1.6 / (1/5)</gadget>
<output>8</output>

<gadget id="calculator">8 * 8</gadget>
<output>64</output>

<result>64</result>