If a rectangle is 4 cm long and 3 cm wide, if it is enlarged by 3:1, what is the area in square centimeters?
一个长方形长4厘米，宽3厘米，如果按3：1放大，得到的面积是多少平方厘米．
<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<gadget id="calculator">3 * 3</gadget>
<output>9</output>

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

<result>108</result>