The cylindrical pillars of the school's wind and rain stadium are 3 meters high and 0.5 meters in diameter at the bottom. If the pillars are repainted, how many square meters should be painted?
学校风雨球场的圆柱形柱子高3米，底面直径0.5米，若将柱子重新油漆，需油漆的面积是多少平方米．
<gadget id="calculator">3.14 * 0.5 * 3</gadget>
<output>4.71</output>

<result>4.71</result>