The sixth grade students in a certain school account for (2/7) of the whole school, and among the sixth grade students, the three-good students account for (1/10). It is known that there are 14 three-good students. How many students are there in the school?
某校六年级学生占全校人数的(2/7)，六年级学生中三好学生占(1/10)，已知三好学生有14人，全校有学生多少人？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

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

<gadget id="calculator">14 / (1/10) / (2/7)</gadget>
<output>490</output>

<result>490</result>