The perimeter of a rectangle is 12 meters, and the ratio of length to width is 5:1. What is the area of the rectangle?
一个长方形的周长是12米，长与宽的比是5：1，这个长方形的面积是多少．
<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">6 * 6 * (1/6)</gadget>
<output>6</output>

<result>6</result>