There are 28 students with good grades in the sixth grade, which is (1/6) of the number of students in the sixth grade, and the number of students in the sixth grade accounts for (2/9) of the total number of students in the school. How many students are there in the school?
六年级有三好学生28人，是六年级学生人数的(1/6)，六年级学生人数占全校学生人数的(2/9)．全校有学生多少人？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">28 / (1/6)</gadget>
<output>168</output>

<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">168 / (2/9)</gadget>
<output>756</output>

<result>756</result>