Lay square floor tiles on the kitchen floor with a length of 30dm and a width of 24dm. If the side length of the floor tiles is an integer number of decimeters, you need to choose from square tiles with a side length of how many decimeters, so as to lay them neatly and economically.
给长30dm、宽24dm的厨房地面铺正方形地砖，若地砖的边长为整数分米，则需从边长为多少分米的方砖中选择，才能铺得即整齐又节约．
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<result>6</result>