A rectangle with a length of 4 cm and a width of 1.5 cm is enlarged by 3:1, what is the area of the figure obtained in square centimeters?
一个长4厘米，宽1.5厘米的长方形按3：1放大，得到的图形面积是多少平方厘米．
<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<gadget id="calculator">1.5 * 3</gadget>
<output>4.5</output>

<gadget id="calculator">12 * 4.5</gadget>
<output>54</output>

<result>54</result>