There are 180 girls in a certain school, accounting for 40% of the total number of students in the school. How many students are there in the school?
某校有女生180人，占全校学生总数40%，学校有多少学生？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">180 / (2/5)</gadget>
<output>450</output>

<result>450</result>