A rectangle with a perimeter of 60 cm has a ratio of length to width of 7:8, what is the area of the rectangle in cm**2.
周长为60cm的长方形，长与宽的比是7：8，这个长方形的面积是多少cm**2．
<gadget id="calculator">60 / 2</gadget>
<output>30</output>

<gadget id="calculator">7 + 8</gadget>
<output>15</output>

<gadget id="calculator">7 / 15</gadget>
<output>7/15 = around 0.466667</output>

<gadget id="calculator">30 * (7/15)</gadget>
<output>14</output>

<gadget id="calculator">8 / 15</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">30 * (8/15)</gadget>
<output>16</output>

<gadget id="calculator">14 * 16</gadget>
<output>224</output>

<result>224</result>