There are 3 classes in the sixth grade, with 30 students in each class. The number of girls in the first class is the same as the number of boys in the second class, and (1/3) in the third class are boys. How many boys are there in the three classes?
六年级3个班，每班30人，一班女生的人数与二班男生的人数同样多，三班的(1/3)是男生．三个班一共有多少名男生？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">30 * (1/3)</gadget>
<output>10</output>

<gadget id="calculator">30 + 10</gadget>
<output>40</output>

<result>40</result>