Paint a cylindrical pillar in the hall. The diameter of this pillar is 60cm and the height is 3m. Find the area of the painted part.
把大厅内一根圆柱形的柱子涂上油漆，这根柱子的直径是60cm，高是3m，求涂上油漆部分的面积．
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">3.14 * (3/5) * 3</gadget>
<output>5.652</output>

<result>5.652</result>