The length of a rectangle is 5 cm and the width is 3 cm. If its length is tripled and its width tripled, what is the area of the rectangle now?
一个长方形的长为5厘米，宽为3厘米，如果将它的长增加到3倍，宽增加3倍，那么现在这个长方形的面积是多少？
<gadget id="calculator">5 * 3</gadget>
<output>15</output>

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

<gadget id="calculator">3 + 9</gadget>
<output>12</output>

<gadget id="calculator">15 * 12</gadget>
<output>180</output>

<result>180</result>