Xiaohong is decorating her house, and she has laid floor tiles with an area of 36dm**2 in the living room, and she used 108 tiles in total. If it is replaced with square tiles with a side length of 4dm, how many tiles are needed?
小红进行房屋装修，在客厅是铺了面积是36dm**2的地砖，一共用了108块，如果换成边长是4dm的方砖，需要多少块？
<gadget id="calculator">36 * 108</gadget>
<output>3_888</output>

<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<gadget id="calculator">3_888 / 16</gadget>
<output>243</output>

<result>243</result>