There are 45 students in Class 1 of the sixth grade, the number of boys is the number of girls (4/5). How many girls are there in Class 1, Grade 6?
六年级一班有学生45人，其中男生人数是女生人数的(4/5)．六年级一班有女生多少人？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 + (4/5)</gadget>
<output>9/5 = around 1.8</output>

<gadget id="calculator">45 / (9/5)</gadget>
<output>25</output>

<result>25</result>