If a house needs to be paved with square bricks, 96 square bricks with a side length of 3 decimeters are needed; if the square bricks with an area of 4 square decimeters are used, at least how many square bricks are needed? Write out the equivalence relationship using the equation solution.
一间房子要用方砖铺地，用边长3分米的方砖需要96块；如果改用面积4平方分米的方砖至少需要多少块？用方程解写出等量关系．
<gadget id="calculator">3 * 3 * 96</gadget>
<output>864</output>

<gadget id="calculator">864 / 4</gadget>
<output>216</output>

<result>216</result>