It takes 1,350 pieces to pave the floor of a large living room with square tiles with a side length of 2 decimeters. If you use tiles with a side length of 3 decimeters to pave the floor of this large living room, how many pieces are needed?
用边长2分米的正方形瓷砖铺一间大客厅的地面，需用1350块，如果改用边长3分米的瓷砖铺这间大客厅的地面，需要多少块？
<gadget id="calculator">2 * 2 * 1_350</gadget>
<output>5_400</output>

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

<gadget id="calculator">5_400 / 9</gadget>
<output>600</output>

<result>600</result>