The school plans to pave the floor of the computer room with square bricks. If the side length is 6 decimeters, 250 yuan is needed. How many blocks are needed if the side length is 5 decimeters instead? (Answer with proportional knowledge)
学校计划用方砖铺微机室的地面．如果用边长是6分米的，需要250块．如果改用边长为5分米的，需要多少块？(用比例知识解答)
<gadget id="calculator">6 * 6 * 125</gadget>
<output>4_500</output>

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

<gadget id="calculator">4_500 / 25</gadget>
<output>180</output>

<result>180</result>