A piece of iron wire forms a square with a side length of 7 decimeters. If this iron wire forms a rectangle with a length of 9 decimeters, what is the area of the rectangle?
一根铁丝正好围成一个边长是7分米的正方形，如果将这根铁丝围成一个长是为9分米的长方形，这个长方形的面积是多少平方分米？
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">7 * 2</gadget>
<output>14</output>

<gadget id="calculator">14 - 9</gadget>
<output>5</output>

<gadget id="calculator">9 * 5</gadget>
<output>45</output>

<result>45</result>