The length of a rectangle is 10 decimeters. After reducing the length by 25% and increasing the width by 1.5 decimeters, it becomes a square. What is the area of the original rectangle?
一个长方形的长是10分米，把长减少25%以后，宽增加1.5分米，它就变成了正方形．原来长方形的面积是多少？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">10 * (3/4)</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">(15/2) - 1.5</gadget>
<output>6</output>

<gadget id="calculator">10 * 6</gadget>
<output>60</output>

<result>60</result>