There are 600 students in the lower grades of a certain school, the middle grades are from the lower grades (5/6) and the upper grades (5/7). How many senior students are there in this school?
某学校低年级有600人，中年级人数是低年级的(5/6)，又是高年级的(5/7)．这个学校高年级有学生多少人？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">(5/6) / (5/7)</gadget>
<output>7/6 = around 1.166667</output>

<gadget id="calculator">600 * (7/6)</gadget>
<output>700</output>

<result>700</result>