To pave a room with floor tiles, if you use square floor tiles with a side length of 3 decimeters, 320 tiles are exactly covered. If you switch to floor tiles with an area of 16 square decimeters, how many pieces are needed at least.
给一个房间铺地砖，如果用边长3分米的正方形地砖铺，320块正好铺满．如果改用面积是16平方分米的地砖铺，至少需要多少块．
<gadget id="calculator">320 * 3 * 3</gadget>
<output>2_880</output>

<gadget id="calculator">2_880 / 16</gadget>
<output>180</output>

<result>180</result>