The length of a rectangle is 12 decimeters. If the width is extended by 20%, it becomes a square. What is the area of the original rectangle?
一个长方形的长是12分米，若把宽延长20%后就变成正方形，原来长方形的面积是多少？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">12 / (6/5)</gadget>
<output>10</output>

<gadget id="calculator">12 * 10</gadget>
<output>120</output>

<result>120</result>