rectangle is 27 decimeters long and the ratio of length to width is 3:2. What is the perimeter of this rectangle?
一个长方形长27分米，长与宽的比是3：2，这个长方形的周长是多少？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">27 * (2/3)</gadget>
<output>18</output>

<gadget id="calculator">27 + 18</gadget>
<output>45</output>

<gadget id="calculator">45 * 2</gadget>
<output>90</output>

<result>90</result>