Simplify the following text for a Grade 4 native English-speaking person.
Original: For a full-length ( 90-minute ) movie , there would be approximately 64,800 stops , and possibly far more if parts were shot with `` singles '' or `` ones '' ( one frame exposed for each shot ) .
Simplified: For a full-length ( 90-minute ) movie , there would be about 64,800 stops . IF some of the parts were done with only a single , not double frame , there would be even more stops .