A rectangle has a length of 4 cm and a width of 3 cm. If its length is doubled and its width doubled, what is the area of the rectangle now?
一个长方形长4厘米，宽3厘米，如果将它的长增加2倍，宽增加到2倍，那么现在这个长方形的面积是多少？
<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">4 + 8</gadget>
<output>12</output>

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">12 * 6</gadget>
<output>72</output>

<result>72</result>