In a hall of the Ming Tombs, there are four log-shaped nanmu pillars, each 14.3 meters high and 1.7 meters in diameter. How many kilograms of paint are needed to paint them all with a layer of red paint? (0.5 kg of paint per square meter)
在明十三陵的一个大殿中，有四根圆木形状的楠木柱，每根高14.3米，直径是1.7米，要把它们全部涂上一层红油漆，一共需要多少千克油漆？(每平方米需油漆0.5千克)
<gadget id="calculator">3.14 * 1.7 * 14.3</gadget>
<output>76.3334</output>

<gadget id="calculator">76.3334 * 4</gadget>
<output>305.3336</output>

<gadget id="calculator">305.3336 * 0.5</gadget>
<output>152.6668</output>

<result>152.6668</result>