The perimeter of a rectangle is 24 cm, and the ratio of length to width is 5:3. What is the area of the rectangle in square centimeters?
一个长方形周长24厘米，长与宽的比是5：3，这个长方形的面积是多少平方厘米．
<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<gadget id="calculator">24 / 2 / 8</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(3/2) * 5</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">(3/2) * 3</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>