A box of milk, grandma drank (2/9), Hong Hong drank (4/9), and Xiao Ming drank the rest, how much did Xiao Ming drink?
一盒牛奶，奶奶喝了(2/9)，红红喝了(4/9)，其余是小明喝的，小明喝了几分之几？
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">1 - (2/9) - (4/9)</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>