To pave the floor with square bricks, 3600 square bricks with a side length of 0.15 meters are needed. If the square bricks with a side length of 0.25 meters are used to pave the ground, how many square bricks are needed?
用方砖铺地，用每块边长0.15米的正方形方砖要3600块，若用每块边长0.25米的正方形方砖铺这块地，需要用多少块？
<gadget id="calculator">0.15 * 0.15 * 3_600</gadget>
<output>81</output>

<gadget id="calculator">0.25 * 0.25</gadget>
<output>0.0625</output>

<gadget id="calculator">81 / 0.0625</gadget>
<output>1_296</output>

<result>1_296</result>