There are 233 students in the fifth grade and 264 students in the sixth grade. It is necessary to select (2/7) of the total number of students in the fifth and sixth grades to participate in group gymnastics training. How many students did not participate in the training?
五年级有学生233人，六年级有学生264人，要选取五、六年级学生总数的(2/7)参加团体操训练．没有参加训练的学生有多少人？
<gadget id="calculator">233 + 264</gadget>
<output>497</output>

<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">1 - (2/7)</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">497 * (5/7)</gadget>
<output>355</output>

<result>355</result>