The sum of (2/5) the number of boys in the sixth grade of a certain primary school and the number of girls in the whole grade is 102, and the number of boys (7/8) is equal to the number of girls in the whole grade. How many boys are there in the whole grade?
某小学六年级男生人数的(2/5)与全年级女生人数的和是102人，男生人数的(7/8)与全年级女生人数相等，全年级男生多少人？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">(2/5) + (7/8)</gadget>
<output>51/40 = around 1.275</output>

<gadget id="calculator">102 / (51/40)</gadget>
<output>80</output>

<result>80</result>