The school lends 105 books to sixth-grade students, one for each student. If the books are first lent to boys and the rest are lent to girls, they can only be lent to (1/3) of the girls; if they are lent to girls first, If the remaining books are lent to boys, half of the boys cannot borrow books. How many people are there in the sixth grade?
学校把105本书借给六年级的学生，一人一本，若先将书借给男生，剩下的借给女生，则只能借给(1/3)的女生；若先借给女生，剩下的书借给男生，则有一半的男生借不到书，求六年级共有多少人？
<gadget id="calculator">315 - 105</gadget>
<output>210</output>

<gadget id="calculator">3 - 2</gadget>
<output>1</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3 - (1/2)</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">210 / (5/2)</gadget>
<output>84</output>

<gadget id="calculator">84 + 63</gadget>
<output>147</output>

<result>147</result>