Question: Cut potatoes up to make french fries.
Options:
Wash and scrub the potatoes, let dry.  Use a mandolin set to 7 mm, slice the potatoes into strips. Soak potato strips in cold water for 30 minutes, let dry.
Wash and scrub the potatoes, let dry.  Use a food processor and shred the potatoes.  Arrange the shredded potatoes on a cooking sheet and let dry.
Answer: Wash and scrub the potatoes, let dry.  Use a mandolin set to 7 mm, slice the potatoes into strips. Soak potato strips in cold water for 30 minutes, let dry.