We look at the division of 66326171 by 839 
The aim is to understand the frequency of 839 in 66326171.

Step 1:
The number 839 fits into 6 0 times, leaving a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 839

Let's proceed to step 2:
The number 839 fits into 66 0 times, leaving a remainder of 66.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 66, we end up with 66.
Grab the next digit (3) from the dividend, add it to 66, then carry on: 663 / 839

Advancing to step 3:
If we divide 663 by 839, we get 0 and a remainder of 663.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 663 and we're left with 663.
Append the next digit (2) from the dividend to 663 and continue with: 6632 / 839

Let's proceed to step 4:
When dividing 6632 by 839, we get 7 with a remainder of 759.
The next digit of our result is 7. 
Result so far: 7.0
The remainder is 759 after subtracting 5873 from 6632.
Grab the next digit (6) from the dividend, add it to 759, then carry on: 7596 / 839

Moving on to step 5:
7596 divided by 839 is 9 with a remainder of 45.
Record the quotient 9 as the next digit in the result. 
Result so far: 79.0
If we take 7551 away from 7596, we end up with 45.
Take the next digit (1) from the dividend and append it to 45, then repeat: 451 / 839

Going ahead to step 6:
839 goes into 451 0 times with a remainder of 451.
The number 0 becomes the next digit in our result. 
Result so far: 790.0
Subtracting 0 from 451 leaves us with 451.
Bring next digit (7) of the dividend behind the 451 and repeat the process: 4517 / 839

Moving on to step 7:
4517 divided by 839 is 5 with a remainder of 322.
The number 5 becomes the next digit in our result. 
Result so far: 7905.0
Subtract 4195 from 4517 to get 322.
Include the next digit (1) from the dividend after 322, then repeat: 3221 / 839

On to step 8:
The number 839 fits into 3221 3 times, leaving a remainder of 704.
Use 3 as the next digit of our solution. 
Result so far: 79053.0
Subtract 2517 from 3221 to get 704.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7040, and continue the process.

Moving on to step 9:
The number 839 fits into 7040 8 times, leaving a remainder of 328.
Use 8 as the next digit of our solution. 
Result so far: 79053.8
If we subtract 6712 from 7040, we get 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

Let's proceed to step 10:
If we divide 3280 by 839, we get 3 and a remainder of 763.
Put 3 as the next digit of the answer. 
Result so far: 79053.83
Subtract 2517 from 3280 to get 763.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7630, and continue the process.

Step 11:
839 goes into 7630 9 times with a remainder of 79.
The next digit of our result is 9. 
Result so far: 79053.839
If we subtract 7551 from 7630, we get 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Step 12:
If we divide 790 by 839, we get 0 and a remainder of 790.
Write down 0 as next digit of the result. 
Result so far: 79053.839
If we subtract 0 from 790, we get 790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7900, and continue the process.

Advancing to step 13:
If we divide 7900 by 839, we get 9 and a remainder of 349.
The next digit of our result is 9. 
Result so far: 79053.83909
If we take 7551 away from 7900, we end up with 349.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3490, and continue the process.

Let's proceed to step 14:
If we divide 3490 by 839, we get 4 and a remainder of 134.
The number 4 becomes the next digit in our result. 
Result so far: 79053.839094
If we take 3356 away from 3490, we end up with 134.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1340, and continue the process.

On to step 15:
When dividing 1340 by 839, we get 1 with a remainder of 501.
Write down 1 as next digit of the result. 
Result so far: 79053.8390941
If we subtract 839 from 1340, we get 501.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5010, and continue the process.

On to step 16:
5010 divided by 839 is 5 with a remainder of 815.
Write down 5 as next digit of the result. 
Result so far: 79053.83909415
If we take 4195 away from 5010, we end up with 815.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8150, and continue the process.

After the division, we end up with 79053.83909415 and a remainder of 8.15e-07.