For a room, if you use square bricks with a side length of 3 decimeters to pave the floor, you need 350 pieces. If you use square bricks with a side length of 5 decimeters instead, how many square bricks are needed? (Answer with proportional knowledge)
一房间，若用边长是3分米的方砖来铺地面，需要350块，如果改用边长是5分米的方砖来铺，需要方砖多少块？(用比例知识解答)
<gadget id="calculator">3 * 3 * 350</gadget>
<output>3_150</output>

<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">3_150 / 25</gadget>
<output>126</output>

<result>126</result>