A small auditorium with a length of 18 meters and a width of 12 meters is laid on the ground with square floor tiles with a side length of 40 cm. How many such floor tiles are needed to cover the auditorium?
一个长18米，宽12米的小礼堂，在地上铺边长为40厘米的正方形地砖，铺满这个礼堂至少需要多少块这样的地砖？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) * (2/5)</gadget>
<output>4/25 = around 0.16</output>

<gadget id="calculator">12 / (4/25)</gadget>
<output>75</output>

<gadget id="calculator">18 * 75</gadget>
<output>1_350</output>

<result>1_350</result>