rectangle with a ratio of length to width of 7:5 is surrounded by an iron wire with a length of 240 cm. What is the area of the rectangle in square centimeters?
用一根长为240厘米的铁丝围成一个长与宽的比是7：5的长方形，这个长方形的面积是多少平方厘米？
<gadget id="calculator">240 / 2</gadget>
<output>120</output>

<gadget id="calculator">7 + 5</gadget>
<output>12</output>

<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">120 * (7/12)</gadget>
<output>70</output>

<gadget id="calculator">120 - 70</gadget>
<output>50</output>

<gadget id="calculator">70 * 50</gadget>
<output>3_500</output>

<result>3_500</result>