The width of a rectangle is long (3/5). If the width is increased by 2 decimeters, it becomes a square. What is the area of the original rectangle?
一个长方形的宽是长的(3/5)，如果宽增加2分米就变成一个正方形，原来的长方形的面积是多少？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">2 / (2/5)</gadget>
<output>5</output>

<gadget id="calculator">5 - 2</gadget>
<output>3</output>

<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<result>15</result>