There are 105 students in the sixth grade in a certain school, of which (2/3) are boys, and all of them have reached the standard in the physical exercise standard test, while (1/7) of the girls have failed to reach the standard. How many of them failed to meet the standard?
某校六年级有105人，其中男生占(2/3)，在体育锻炼标准测试中，全部达标，而女生有(1/7)的人未能达标，问未能达标的有多少人？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

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

<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">105 * (1/3) * (1/7)</gadget>
<output>5</output>

<result>5</result>