A rectangle is surrounded by 28 cm wire. The ratio of length to width is 3:4. What is the area of the rectangle in square centimeters?
用28厘米的铁丝围城一个长方形，长与宽的比是3：4，这个长方形的面积是多少平方厘米．
<gadget id="calculator">28 / 2</gadget>
<output>14</output>

<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">14 * (4/7)</gadget>
<output>8</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">14 * (3/7)</gadget>
<output>6</output>

<gadget id="calculator">8 * 6</gadget>
<output>48</output>

<result>48</result>