If you use square bricks with a side length of 3 decimeters to pave a room, you need 800 yuan. If the floor is paved with square bricks with a side length of 6 decimeters, how many pieces are needed? (Answer with proportional knowledge)
如果用边长3分米的方砖给一个房间铺地，需要800块．如果改用边长6分米的方砖铺地，需要多少块？(用比例知识解答)
<gadget id="calculator">3 * 3 * 800</gadget>
<output>7_200</output>

<gadget id="calculator">6 * 6</gadget>
<output>36</output>

<gadget id="calculator">7_200 / 36</gadget>
<output>200</output>

<result>200</result>