Table:
text: Santa Clara Unified School District
Schools
Schools
School_Name City Students FTE_Teachers Pupil_Teacher_Ratio School_Level Low_Grade High_Grade
Bowers Elementary School Santa Clara 403 21 19.2 Primary Kindergarten 5th Grade
Bracher Elementary School Santa Clara 386 19.8 19.5 Primary Kindergarten 5th Grade
Braly Elementary School Sunnyvale 307 16.6 18.5 Primary Kindergarten 5th Grade
Briarwood Elementary School Santa Clara 414 23.6 17.5 Primary Kindergarten 5th Grade
Buchser Middle School Santa Clara 885 42.6 20.8 Middle 6th Grade 8th Grade
Bullis Charter School Los Altos 350 16 21.75 Elementary Kindergarten 6th Grade
Cabrillo Middle School Santa Clara 883 40 22.1 Middle 6th Grade 8th Grade
Don Callejon K-8 School Santa Clara 749 21 16.9 K-8 Kindergarten 8th Grade

Question: What is the highest student enrollment with a 20.8 teacher-to-student ratio in the Santa Clara Unified School District?