MOV, OggWebm.
IMDb link
A nice movie directed by Jodie Foster who plays also the Mother of Fred.
There are some arithmetic computations in. For example
465*24*60*48 = 32140800
3067 is prime.
For the riddle to solve the system of nonlinear
Diophantine equations (a+10b)/(a*b) =3, a+10b+18=b+10a with solution a=4,b=3.
A complete solution would also have to establish that there are no solutions for
numbers larger than 100 but that is harder to see: here is the
computer algebra verification for 3 digits or 4 digit numbers.