A wire 24 cm long surrounds it into a rectangle whose length to width ratio is 3:1. What is the area of the rectangle in square centimeters?
一根长24厘米的铁丝把它围成一个长与宽的比是3﹕1的长方形，这个长方形的面积是多少平方厘米．
<gadget id="calculator">24 / 2</gadget>
<output>12</output>

<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">12 * (3/4) * 12 * (1/4)</gadget>
<output>27</output>

<result>27</result>