If two squares with side lengths of 6 decimeters are put together to form a rectangle, what is the area of it?
两个边长都为6分米的正方形拼成一个长方形，它的面积是多少平方分米．
<gadget id="calculator">6 * 6 * 2</gadget>
<output>72</output>

<result>72</result>