There are 54 students in Class 1, among which the number of boys is 4/5 of the number of girls. How many boys are there?
六1班共有学生54人，其中男生人数是女生人数的(4/5)，男生有多少人？
<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">54 * (4/9)</gadget>
<output>24</output>

<result>24</result>