The width of a rectangle is 3.5 cm and the length is 1.2 times the width. What is the perimeter of the rectangle in cm?
一个长方形的宽是3.5厘米，长是宽的1.2倍，这个长方形的周长是多少厘米？
<gadget id="calculator">3.5 * 1.2</gadget>
<output>4.2</output>

<gadget id="calculator">4.2 + 3.5</gadget>
<output>7.7</output>

<gadget id="calculator">7.7 * 2</gadget>
<output>15.4</output>

<result>15.4</result>