The length of the rectangle is 5cm less than twice the width, and the known width is 8cm. Find the area of the rectangle.
长方形的长是宽的2倍少5cm，已知宽是8cm，求这个长方形的面积多少．
<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<gadget id="calculator">16 - 5</gadget>
<output>11</output>

<gadget id="calculator">11 * 8</gadget>
<output>88</output>

<result>88</result>