The master worker paves a square floor with rectangular floor tiles with a length of 9 decimeters and a width of 6 decimeters. At least how many such rectangular floor tiles should be used for paving?
工人师傅用长9分米、宽6分米的长方形地砖铺成一个正方形地面，至少要用多少块这样的长方形地砖去铺？
<gadget id="calculator">9 / 3</gadget>
<output>3</output>

<gadget id="calculator">6 / 3</gadget>
<output>2</output>

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<result>6</result>