The number of students in the sixth grade of Guangming Primary School who have reached the "National Physical Exercise Standards" accounted for (7/9) of the total number of students in the whole grade. Among the students who reached the standard (3/7) were girls, and the number of boys who reached the standard accounted for a few percent of the total number of students in the sixth grade. How much?
光明小学六年级已经达到《国家体育锻炼标准》的学生人数占全年级总人数的(7/9)，达标的学生中有(3/7)是女生，达标的男生占六年级总人数的几分之几？
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">1 - (3/7)</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">7 / 9</gadget>
<output>7/9 = around 0.777778</output>

<gadget id="calculator">(4/7) * (7/9)</gadget>
<output>4/9 = around 0.444444</output>

<result>4/9 = around 0.444444</result>