If a house needs to be paved with square bricks, 128 square bricks with an area of 9 square decimeters are needed. If the floor is paved with square bricks with a side length of 4 decimeters, how many bricks are needed?
一间房子要用方砖铺地，用面积9平方分米的方砖需要128块，如果改用边长4分米的方砖铺地，需要多少块？
<gadget id="calculator">96 * 9</gadget>
<output>864</output>

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

<gadget id="calculator">864 / 16</gadget>
<output>54</output>

<result>54</result>