Consider the following relation:
R (A B C) A primary key with 100 tuples.
S (E F G) E primary key with 50 tuples.
T (AE D) AE primary key with 80 tuples.
U (D G H) H primary key with 10 tuples.
The maximum number of possible records in the result of R⋈S⋈T⋈U _______.