The number of boys in Xinhua Primary School accounts for 3/8 of the total number of students. It is known that there are 65 girls. How many boys are there?
新华小学男生人数占总人数的(3/8)，已知女生人数有65人，男生有多少人？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (3/8)</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">65 / (5/8)</gadget>
<output>104</output>

<gadget id="calculator">104 - 65</gadget>
<output>39</output>

<result>39</result>