We divide 645257 by 40
The aim is to understand the frequency of 40 in 645257.

Going ahead to step 1:
40 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 40

Going ahead to step 2:
When dividing 64 by 40, we get 1 with a remainder of 24.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 40 from 64 to get 24.
Append the next digit (5) from the dividend to 24 and continue with: 245 / 40

Moving on to step 3:
The number 40 fits into 245 6 times, leaving a remainder of 5.
Use 6 as the next digit of our solution. 
Result so far: 16.0
If we subtract 240 from 245, we get 5.
Grab the next digit (2) from the dividend, add it to 5, then carry on: 52 / 40

On to step 4:
52 divided by 40 is 1 with a remainder of 12.
The number 1 becomes the next digit in our result. 
Result so far: 161.0
Subtracting 40 from 52 leaves us with 12.
Bring next digit (5) of the dividend behind the 12 and repeat the process: 125 / 40

Let's proceed to step 5:
125 divided by 40 is 3 with a remainder of 5.
Record the quotient 3 as the next digit in the result. 
Result so far: 1613.0
If we subtract 120 from 125, we get 5.
Include the next digit (7) from the dividend after 5, then repeat: 57 / 40

Advancing to step 6:
40 can be fit into 57 1 times, resulting in a remainder of 17.
Write down 1 as next digit of the result. 
Result so far: 16131.0
Deduct 40 from 57 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 7:
If we divide 170 by 40, we get 4 and a remainder of 10.
Record the quotient 4 as the next digit in the result. 
Result so far: 16131.4
Subtracting 160 from 170 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 8:
40 can be fit into 100 2 times, resulting in a remainder of 20.
Use 2 as the next digit of our solution. 
Result so far: 16131.42
If we subtract 80 from 100, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 9:
When dividing 200 by 40, we get 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 16131.425
Deduct 200 from 200 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 10:
40 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 16131.425
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 11:
If we divide 0 by 40, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 16131.425
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 16131.425 and a remainder of 0.0.