glass of pure fruit juice, Xiao Ming drank (1/4) for the first time, then filled the glass with water, stirred evenly, and drank (1/4) again, how much pure juice is left?
一杯纯果汁，小明第一次喝去(1/4)，再往杯里倒满水搅拌均匀，又喝去(1/4)，还剩多少纯果汁？
<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>

<gadget id="calculator">1 - (1/4) - (3/16)</gadget>
<output>9/16 = around 0.5625</output>

<result>9/16 = around 0.5625</result>