The school is going to decorate the classroom floor. It needs 300 yuan to pave the classroom with square bricks with a side length of 15cm. If the square bricks with a side length of 25cm are used instead, how many square bricks are needed? (The area of the classroom floor is constant) (proportional solution)
学校迸行教室地面的装修，用边长为15cm的方砖给教室铺地，需要300块，如果改用边长为25cm的方砖铺地，需要多少块方砖？(教室地面的面积是不变的)(比例解)
<gadget id="calculator">15 * 15 * 300</gadget>
<output>67_500</output>

<gadget id="calculator">25 * 25</gadget>
<output>625</output>

<gadget id="calculator">67_500 / 625</gadget>
<output>108</output>

<result>108</result>