A rectangle is 12 centimeters long. If its width is extended (1/3), it becomes a square. What is the area of the rectangle in square centimeters?
一个长方形长12厘米，如果将它的宽延长(1/3)后，就变成了一个正方形，原来这个长方形面积是多少平方厘米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 + (1/3)</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">12 / (4/3)</gadget>
<output>9</output>

<gadget id="calculator">9 * 12</gadget>
<output>108</output>

<result>108</result>