A small living room with a length of 4 meters and a width of 3 meters is going to be paved with square floor tiles of 20 square decimeters. How many such floor tiles do you need to buy at least?
一个长4米、宽3米的小客厅，准备铺上20平方分米的正方形地砖，至少需要买这样的地砖多少块？
<gadget id="calculator">3 / 0.2</gadget>
<output>15</output>

<gadget id="calculator">4 * 15</gadget>
<output>60</output>

<result>60</result>