There are two identical cups, A and B. There is half a cup of clear water in cup A, and a solution containing 50% alcohol in cup B. Pour half of the alcohol solution in cup B into cup A, stir well, and then Pour half of the alcohol solution in cup A into cup B. What percentage of the solution is the alcohol in cup B at this time?
有甲、乙两个同样的杯子，甲杯中有半杯清水，乙杯中盛满了含50%酒精的溶液，先将乙杯中酒精溶液的一半倒入甲杯，搅匀后，再将甲杯中酒精溶液的一半倒入乙杯．问这时乙杯中的酒精是溶液的几分之几？
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) / 2</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) * (1/2)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/8) + (1/4)</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>