There are 104 boys (1/5) and girls (1/6) in the sixth grade of a certain school, and 105 boys (1/6) and girls (1/5) in the sixth grade. how many people?
某校六年级男生人数的(1/5)和女生人数的(1/6)共104人，男生人数的(1/6)和女生人数的(1/5)共105人，该六年级共有多少人？
<gadget id="calculator">104 + 105</gadget>
<output>209</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">(1/5) + (1/6)</gadget>
<output>11/30 = around 0.366667</output>

<gadget id="calculator">209 / (11/30)</gadget>
<output>570</output>

<result>570</result>