A cylindrical building with a base diameter of 30 meters and a height of 20 meters is made into a miniature model at a scale of 1:100. What is the surface area of the model in square centimeters?
一个圆柱体建筑物，底面直径是30米，高是20米，按照1：100做成微缩模型，求该模型的表面积是多少平方厘米？
<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<gadget id="calculator">1 / 100</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">15 * 100 * (1/100)</gadget>
<output>15</output>

<gadget id="calculator">15 ** 2</gadget>
<output>225</output>

<gadget id="calculator">3.14 * 225 * 2</gadget>
<output>1_413</output>

<gadget id="calculator">3.14 * 15 * 2 * 20 * (1/100) * 100</gadget>
<output>1_884</output>

<gadget id="calculator">1_413 + 1_884</gadget>
<output>3_297</output>

<result>3_297</result>