There are 5 cylinders in the temple, the radius of the base of the cylinder is 15 cm, and the height is 4 meters. To paint all the cylinders, how many square meters will be painted in total?
寺庙里有5根圆柱子，圆柱的底面半径是15厘米，高是4米．要给圆柱全部刷上油漆，一共要刷多少平方米？
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">3.14 * (3/20) * 2 * 4 * 5</gadget>
<output>18.84</output>

<result>18.84</result>