80cm long iron wire is used to form a rectangular frame, the ratio of length to width is 5:3, what is the area of this rectangular frame?
用80cm长的铁丝围成一个长方形框架，长、宽的比是5：3，这个长方形框架的面积是多少？
<gadget id="calculator">80 / 2</gadget>
<output>40</output>

<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">40 * (5/8)</gadget>
<output>25</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">40 * (3/8)</gadget>
<output>15</output>

<gadget id="calculator">25 * 15</gadget>
<output>375</output>

<result>375</result>