The number of students in the first grade of Wangma Elementary School accounts for (1/7) of the number of students in the remaining grades, and the number of students in the second grade accounts for (1/5) of the number of students in the remaining grades. If there are 91 students in the first and second grades, how many students are there in Wangma Primary School?
王马小学一年级的学生数占其余年级学生数的(1/7)，二年级的学生数占其余年级学生数的(1/5)．如果一、二年级共有91人，王马小学全校学生有多少人？
<gadget id="calculator">1 + 7</gadget>
<output>8</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 + 5</gadget>
<output>6</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/8) + (1/6)</gadget>
<output>7/24 = around 0.291667</output>

<gadget id="calculator">91 / (7/24)</gadget>
<output>312</output>

<result>312</result>