The school wants to lay floor tiles for a meeting room with a length of 9 meters and a width of 6 meters. 4 floor tiles cover exactly 1 square meter, how many floor tiles are needed to finish the meeting room?
学校要给一间长9米，宽6米的会议室铺地砖．4块地砖正好铺1平方米，铺完这间会议室至少需要多少块地砖？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">6 / (1/4)</gadget>
<output>24</output>

<gadget id="calculator">9 * 24</gadget>
<output>216</output>

<result>216</result>