9 small squares with an area of 1 square decimeter are put together to form a rectangle. What is the area of the rectangle in square decimeters?
将9个面积是1平方分米的小正方形拼成一个长方形，长方形的面积是多少平方分米．
<gadget id="calculator">1 * 9</gadget>
<output>9</output>

<result>9</result>