If a classroom is paved with square bricks with a side length of 40 cm, 200 bricks are needed. If the floor is paved with square bricks with a side length of 50 cm, how many bricks are needed?
一间教室，用边长为40厘米的方砖铺地，需用200块，如果改用边长50厘米的方砖铺，需用多少块？
<gadget id="calculator">40 * 40 * 200</gadget>
<output>320_000</output>

<gadget id="calculator">50 * 50</gadget>
<output>2_500</output>

<gadget id="calculator">320_000 / 2_500</gadget>
<output>128</output>

<result>128</result>