Use square bricks with an area of 18 square centimeters to pave the floor, and 200 bricks are just finished. If you use square bricks with a side length of 12 cm instead, how many bricks are needed?
用面积是18平方厘米的方砖铺地，200块正好铺完．如果改用边长是12厘米的方砖铺地，需要多少块？
<gadget id="calculator">18 * 200</gadget>
<output>3_600</output>

<gadget id="calculator">12 * 12</gadget>
<output>144</output>

<gadget id="calculator">3_600 / 144</gadget>
<output>25</output>

<result>25</result>