If a rectangle has a length to width ratio of 7:2 and a perimeter of 36 meters, what is the area of the rectangle in square meters?
一个长方形，长与宽的比是7：2，周长是36米，则这个长方形的面积是多少平方米．
<gadget id="calculator">7 + 2</gadget>
<output>9</output>

<gadget id="calculator">7 / 9</gadget>
<output>7/9 = around 0.777778</output>

<gadget id="calculator">(7/9) / 2</gadget>
<output>7/18 = around 0.388889</output>

<gadget id="calculator">36 * (7/18)</gadget>
<output>14</output>

<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">(2/9) / 2</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">36 * (1/9)</gadget>
<output>4</output>

<gadget id="calculator">14 * 4</gadget>
<output>56</output>

<result>56</result>