The bedroom area of Yangyang's house is 12 square meters. If square floor tiles with a side length of 4 decimeters are used to pave the floor, at least how many such square tiles are needed.
阳阳家的卧室面积是12平方米，如果用边长4分米的正方形地砖铺地，至少需要多少块这样的方砖．
<gadget id="calculator">4 / 100</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">4 * (1/25)</gadget>
<output>4/25 = around 0.16</output>

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

<result>75</result>