The least common multiple (LCM) of 78, 90, and 140 is: 16,380
78 × 210 = 16,380
90 × 182 = 16,380
140 × 117 = 16,380
More than one contact can be added to the group at a time.
What do you need help with? I’m confused
Https://docs.microsoft.com/en-us/sql/relational-databases/tables/create-foreign-key-relationships
