A rectangular football field is 180m long and 90m wide. Draw it on a drawing with a scale of 1:2000. What is the area of the football field drawn on the drawing? (Answer with proportional knowledge)
一个长方形足球场，长180m，宽90m，把它画在比例尺是1：2000的图纸上，画在图上的足球场面积是多少？(用比例知识解答)
<gadget id="calculator">1 / 2_000</gadget>
<output>1/2_000 = around 0.0005</output>

<gadget id="calculator">1 / 18_000</gadget>
<output>1/18_000 = around 0.000056</output>

<gadget id="calculator">(1/2_000) / (1/18_000)</gadget>
<output>9</output>

<gadget id="calculator">9 * 4.5</gadget>
<output>40.5</output>

<result>40.5</result>