Aunt Li's house is going to lay floor tiles for a room that is 4.5 meters long and 3.6 meters wide. If you buy square bricks with a side length of 0.6 meters, how many pieces should you buy at least? (Retain integers)
李阿姨家准备给一间长4.5米，宽3.6米的房间铺地砖．如果购买边长为0.6米的方砖至少应该买多少块？(得数保留整数)
<gadget id="calculator">4.5 * 3.6</gadget>
<output>16.2</output>

<gadget id="calculator">0.6 * 0.6</gadget>
<output>0.36</output>

<gadget id="calculator">16.2 / 0.36</gadget>
<output>45</output>

<result>45</result>