There are 6 columns in the hall. Each column is 6 meters high and 1 meter in diameter. To paint these columns once, the average cost of painting is 1.5 yuan per square meter. How much paint do you need to buy?
大厅里有6根圆柱，每根圆柱的高是6米，直径是1米，把这些圆柱油漆一次，平均每平方米用油漆需1.5元，需要购买多少钱油漆？
<gadget id="calculator">3.14 * 1 * 6 * 6</gadget>
<output>113.04</output>

<gadget id="calculator">113.04 * 1.5</gadget>
<output>169.56</output>

<result>169.56</result>