The water lily in a pond doubles every day, and on the fifth day it has covered the entire pond, and on the second day it has grown to the size of the pond.
一个池塘里的睡莲，每天增长一倍，到第5天已长满了整个池塘，第二天长到这个池塘的多少．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 * (1/2) * 1 * (1/2) * 1 * (1/2)</gadget>
<output>1/8 = around 0.125</output>

<result>1/8 = around 0.125</result>