Put two squares together to form a rectangle. If the perimeter of the rectangle is 36 cm, what is the area of the rectangle in square centimeters?
把两个正方形摆在一起，拼成一个长方形，如果这个长方形的周长是36厘米，则这个长方形的面积是多少平方厘米．
<gadget id="calculator">2 * 6</gadget>
<output>12</output>

<gadget id="calculator">12 * 6</gadget>
<output>72</output>

<result>72</result>