Find Difference: Determine the difference between 3800 and 3138 to find out how much more we need to reach 3800.Calculation: 3800−3138=662
Divide by 40: Divide the difference by 40 to find out how many 40's are needed to reach or exceed the difference.Calculation: 662÷40=16.55
Round Up: Since we cannot have a fraction of a count when considering how many times a number goes into another, we need to round up to the next whole number.Calculation: We round 16.55 up to 17 because we are looking for the number of 40's to reach or exceed 3800.
Verify Multiplication: Verify that multiplying 17 by 40 will indeed reach or exceed 3800 when added to 3138.Calculation: 17×40=6803138+680=3818