There are 45 students in Class 5 and 1 of Experimental Primary School, of which boys account for (3/5). How many girls are there in this class?
实验小学五1班共有学生45人，其中男生占(3/5)，这个班有女生多少人？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">45 * (2/5)</gadget>
<output>18</output>

<result>18</result>