A cuboid pillar is 4.5 meters high and the bottom is a square with side length 0.6 meters. It is necessary to install tiles around the pillars. The size of the tiles is a square with a side length of 0.6 meters. How many tiles are needed?
一根长方体柱子，高4.5米，底面是边长0.6米的正方形．要給柱子四周贴瓷砖，瓷砖规格是边长0.6米的正方形，要多少块瓷砖？
<gadget id="calculator">0.6 * 0.6</gadget>
<output>0.36</output>

<gadget id="calculator">4.5 / 0.36</gadget>
<output>12.5</output>

<gadget id="calculator">0.6 * 4 * 12.5</gadget>
<output>30</output>

<result>30</result>