There are 540 students in the third grade, which is equivalent to (5/6) of the total number of students in the sixth grade. How many students are there in the sixth grade?
三年级有540个学生，相当于六年级学生总数的(5/6)，六年级有多少个学生？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">540 / (5/6)</gadget>
<output>648</output>

<result>648</result>