Paint 2 pillars. The cross-section of the pillars is a square with a side length of 3 decimeters. The height of the pillars is 4 meters. The paint is 4.5 yuan per square meter. How much is the total cost?
油漆2根柱子，柱子横截面是边长3分米的正方形，柱子高4米，每平方米油漆4.5元，共要多少元？
<gadget id="calculator">0.3 * 4 * 4 * 2</gadget>
<output>9.6</output>

<gadget id="calculator">4.5 * 9.6</gadget>
<output>43.2</output>

<result>43.2</result>