There are 45 students in Class 5 and 1, of which boys account for (4/9), and the number of boys who are short-sighted accounts for 40%. How many boys are there?
五1班有学生45人，其中男生占(4/9)，男生中近视的人数占40%，近视的男生有多少人？
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">45 * (4/9) * (2/5)</gadget>
<output>8</output>

<result>8</result>