The perimeter of a rectangle is 24 decimeters, and the length is twice the width less than 3 decimeters. What is the area of the rectangle?
一个长方形周长是24分米，长是宽的2倍少3分米，这个长方形的面积是多少？
<gadget id="calculator">24 / 2</gadget>
<output>12</output>

<gadget id="calculator">12 + 3</gadget>
<output>15</output>

<gadget id="calculator">15 / 3</gadget>
<output>5</output>

<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">10 - 3</gadget>
<output>7</output>

<gadget id="calculator">7 * 5</gadget>
<output>35</output>

<result>35</result>