To lay floor tiles for a room, use 60 rectangular floor tiles with a length of 4 decimeters and a width of 3 decimeters to just cover it. If a square floor tile with a side length of 4 decimeters is used instead, how many bricks are needed to cover it exactly?
给一个房间铺地砖，用长4分米、宽3分米的长方形地砖60块正好铺满．如果改用边长4分米的正方形地砖，那么需要多少块砖正好铺满？
<gadget id="calculator">3 * 4 * 60</gadget>
<output>720</output>

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

<gadget id="calculator">720 / 16</gadget>
<output>45</output>

<result>45</result>