If a hall is paved with square bricks with a side length of 4 decimeters, 324 pieces are needed; if it is replaced with square bricks with a side length of 3 decimeters, how many pieces are needed? (Solution with proportional knowledge)
一间大厅，用边长4分米的方砖铺地，需要324块；若改铺边长3分米的方砖，需要用多少块？(用比例知识解)
<gadget id="calculator">4 * 4 * 324</gadget>
<output>5_184</output>

<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<gadget id="calculator">5_184 / 9</gadget>
<output>576</output>

<result>576</result>