A rectangular wall newspaper column with a length of 15m and a width of 4m is scaled down to a scale of 1:200 on the drawing, what is the area in cm**2.
一块长方形壁报栏，长15m，宽4m，把它按1：200的比例缩小在图纸上，面积是多少cm**2．
<gadget id="calculator">15 * 100</gadget>
<output>1_500</output>

<gadget id="calculator">1 / 200</gadget>
<output>1/200 = around 0.005</output>

<gadget id="calculator">1_500 * (1/200)</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">4 * 100</gadget>
<output>400</output>

<gadget id="calculator">400 * (1/200)</gadget>
<output>2</output>

<gadget id="calculator">(15/2) * 2</gadget>
<output>15</output>

<result>15</result>