The perimeter of a rectangle is 68 cm, and the ratio of length to width is 10:7. What is the area of the rectangle in square centimeters?
一个长方形的周长是68厘米，长与宽的比是10：7，这个长方形的面积是多少平方厘米？
<gadget id="calculator">68 / 2</gadget>
<output>34</output>

<gadget id="calculator">10 + 7</gadget>
<output>17</output>

<gadget id="calculator">10 / 17</gadget>
<output>10/17 = around 0.588235</output>

<gadget id="calculator">34 * (10/17)</gadget>
<output>20</output>

<gadget id="calculator">7 / 17</gadget>
<output>7/17 = around 0.411765</output>

<gadget id="calculator">34 * (7/17)</gadget>
<output>14</output>

<gadget id="calculator">20 * 14</gadget>
<output>280</output>

<result>280</result>