It takes 200 bricks to pave the classroom with square bricks with a side length of 15 cm. How many bricks are needed if the square bricks with a side length of 25 cm are used instead?
用边长15厘米的方砖给教室铺地，需要200块，如果改用边长25厘米的方砖铺地，需要多少块砖？
<gadget id="calculator">15 * 15 * 200</gadget>
<output>45_000</output>

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

<gadget id="calculator">45_000 / 625</gadget>
<output>72</output>

<result>72</result>