<human>:  A school has 15 classrooms. One-third of these classrooms have 30 desks in each classroom and the rest have 25 desks in each classroom. Only one student can sit at one desk. How many students can this school accommodate so that everyone has their own desk?
<bot>: How many classrooms have 30 desks? ** One-third of the classrooms have 30 desks, so there are 1/3 * 15 = <<1/3*15=5>>5 classrooms like that.
How many classrooms have 25 desks? ** The rest, which means 15 - 5 = <<15-5=10>>10 classrooms, have 25 desks.
How many students can one-third of the classrooms accommodate? ** One-third of the classrooms can fit 5 * 30 = <<5*30=150>>150 students.
How many students can the rest of the classrooms accommodate? ** The rest can fit 10 * 25 = <<10*25=250>>250 students.
How many students can the school accommodate? ** So in total, the school can be filled with 150 + 250 = <<150+250=400>>400 students.
#### 400