The school wants to pave floor tiles for a classroom. If rectangular floor tiles with a length of 3 decimeters and a width of 2 decimeters are used, 800 tiles are exactly covered. If square floor tiles with a side length of 8 decimeters are used instead, how many tiles are needed at least?
学校要给一间教室铺地砖，如果用长3分米，宽2分米的长方形地砖，800块正好铺满，如果改用边长是8分米的正方形地砖，至少需要多少块？
<gadget id="calculator">3 * 2 * 800</gadget>
<output>4_800</output>

<gadget id="calculator">8 * 8</gadget>
<output>64</output>

<gadget id="calculator">4_800 / 64</gadget>
<output>75</output>

<result>75</result>