There is a rectangular vegetable field, its circumference is 320 meters, and the ratio of length to width is 5:3. Draw this field on the drawing at a scale of 1:2000. What is the area of this field in square centimeters? ?
有一块长方形菜地，它的周长是320米，长与宽的比是5：3，把这块地按1：2000的比例尺画在图纸上，这块地的图上面积是多少平方厘米？
<gadget id="calculator">320 / 2</gadget>
<output>160</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">1 / 2_000</gadget>
<output>1/2_000 = around 0.0005</output>

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

<gadget id="calculator">160 * (5/8) * 160 * (5/8) * (1/2_000) * 160 * (3/8) * 160 * (5/8) * (1/2_000)</gadget>
<output>15</output>

<result>15</result>