Explanation:
The GCF of 32 and 80 is 16. To calculate the greatest common factor (GCF) of 32 and 80, we need to factor each number (factors of 32 = 1, 2, 4, 8, 16, 32; factors of 80 = 1, 2, 4, 5, 8, 10, 16, 20, 40, 80) and choose the greatest factor that exactly divides both 32 and 80, i.e., 16.