The perimeter of a rectangle is 24cm, the ratio of length to width is 5:3, what is the area of the rectangle in cm**2.
一个长方形周长是24cm，长与宽的比是5﹕3，长方形的面积是多少cm**2．
<gadget id="calculator">24 / 2</gadget>
<output>12</output>

<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">12 * (5/8)</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">12 - (15/2)</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">(15/2) * (9/2)</gadget>
<output>135/4 = around 33.75</output>

<result>135/4 = around 33.75</result>