For a rectangle, if the length of the short side is increased by 4 cm and the length of the long side is doubled, the area will be tripled. If the length of the long side is shortened by 8 cm, a square will be formed. What is the area of the original rectangle in square centimeters?
一个长方形，若将短边长度增加4厘米，长边长度增加一倍，则面积是原来的3倍，若将长边缩短8厘米，就成正方形，则原长方形面积是多少平方厘米．
<gadget id="calculator">8 + 8</gadget>
<output>16</output>

<gadget id="calculator">16 * 8</gadget>
<output>128</output>

<result>128</result>