Because they divide evenly into 396 with no remainder.
22 and 18, among others
The factors of 396 are: 1, 2, 3, 4, 6, 9, 11, 12, 18, 22, 33, 36, 44, 66, 99, 132, 198, 396
The factors of 396 are: 1, 2, 3, 4, 6, 9, 11, 12, 18, 22, 33, 36, 44, 66, 99, 132, 198, 396.
22 times 18 = 396
396
1, 2, 3, 4, 6, 9, 11, 12, 18, 22, 33, 36, 44, 66, 99, 132, 198, 396.
factors of 18:2, 3, 6, 9factors of 22:2 ,11factors of 30:2,3,5,6,15
18 multiplied by 22=396
factors: 1, 2, 3, 4, 6, 9, 11, 12, 18, 22, 33, 36, 44, 66, 99, 132, 198, 396 prime factors: 2(2), 3(2), 11
18 weeks at 22 hours per week = 18 × 22 = 396 hours 396 hours at 12 per hours = 396 × 12 = 4752.
396
22 x 18 = 396 square feet.