There are 45 students in Class 51, of which boys account for (4/9), and the number of myopia among boys accounts for 10% of the number of boys. How many boys are nearsighted? ．
五1班有学生45人，其中男生占(4/9)，男生中近视的人数占男生人数的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">10 / 100</gadget>
<output>1/10 = around 0.1</output>

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

<result>2</result>