A cup of pure milk, Xiao Ming drank (1/4) cup for the first time, filled the cup with water, and then drank (1/4) cup, Xiao Ming drank the cup of pure milk for the second time How much?
一杯纯牛奶，小明第一次喝去了(1/4)杯，在杯里对满了水，接着又喝去了(1/4)杯，小明第二次喝去了这杯纯牛奶几分之几？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) * (1/4)</gadget>
<output>3/16 = around 0.1875</output>

<result>3/16 = around 0.1875</result>