Xiaopang’s room is 4 meters long and 3 meters wide. If square floor tiles with a side length of 4 decimeters are used to pave the floor, how many such floor tiles are needed?
小胖的房间长4米，宽3米，如果用边长4分米的正方形地砖铺地，那么需要这样的地砖多少块？
<gadget id="calculator">3 * 10</gadget>
<output>30</output>

<gadget id="calculator">4 * 10</gadget>
<output>40</output>

<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<gadget id="calculator">40 / 16</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">30 * (5/2)</gadget>
<output>75</output>

<result>75</result>