Original: The dozen is convenient because its multiples and divisors are convenient: 12 = 2 &times; 2 &times; 3,  3 &times; 4 = 2 &times; 6, 60 = 12 &times; 5, 360 = 12 &times; 30.
Simplified: The dozen is convenient because its multipliers and multiples are convenient: 12 = 3 &times; 2 &times; 2, and 360 = 30 &times; 12.