The area covered by duckweed in the pond doubles every day, and after 14 days it can just cover the entire pond water surface, so how many days can it cover the water surface (1/32).
池塘中浮萍覆盖水面的面积每天扩大1倍，经过14天恰能覆盖整个池塘水面，那么多少天可覆盖水面的(1/32)．
<result>9</result>