There are 180 students in the fifth grade of Yuhua Primary School, among which (3/20) students participated in the choir. Boys account for (1/3) of the students participating in the choir. How many fifth grade boys are in the choir?
育华小学五年级有学生180人，其中(3/20)的学生参加了合唱团．参加合唱团的学生中男生占(1/3)．参加合唱团的五年级男生有多少人？
<gadget id="calculator">3 / 20</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">180 * (3/20) * (1/3)</gadget>
<output>9</output>

<result>9</result>