A rectangle has a width of 2.8 cm and a length 1.5 times its width. What is the perimeter of this rectangle in centimeters?
一个长方形的宽是2.8厘米，长是宽的1.5倍．这个长方形的周长是多少厘米？
<gadget id="calculator">2.8 * 1.5</gadget>
<output>4.2</output>

<gadget id="calculator">4.2 + 2.8</gadget>
<output>7</output>

<gadget id="calculator">7 * 2</gadget>
<output>14</output>

<result>14</result>