There are 45 students in Class 5 and 1, among which boys account for (4/9), and the number of boys who are short-sighted (1/10), how many boys are myopic?
五1班有学生45人，其中男生占(4/9)，男生中近视的人数占(1/10)，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">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">45 * (4/9) * (1/10)</gadget>
<output>2</output>

<result>2</result>