We divide 72267551 by 399
The aim is to understand the frequency of 399 in 72267551.

Moving on to step 1:
When dividing 7 by 399, we get 0 with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 399

Going ahead to step 2:
If we divide 72 by 399, we get 0 and a remainder of 72.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 72 leaves us with 72.
Append the next digit (2) from the dividend to 72 and continue with: 722 / 399

On to step 3:
399 can be fit into 722 1 times, resulting in a remainder of 323.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 399 from 722 and we're left with 323.
Grab the next digit (6) from the dividend, add it to 323, then carry on: 3236 / 399

On to step 4:
3236 divided by 399 is 8 with a remainder of 44.
Record the quotient 8 as the next digit in the result. 
Result so far: 18.0
If we take 3192 away from 3236, we end up with 44.
Fetch the next digit (7) from the dividend, attach it to 44 and continue: 447 / 399

Going ahead to step 5:
447 divided by 399 is 1 with a remainder of 48.
The next digit of our result is 1. 
Result so far: 181.0
The remainder is 48 after subtracting 399 from 447.
Take the next digit (5) from the dividend and append it to 48, then repeat: 485 / 399

Advancing to step 6:
485 divided by 399 is 1 with a remainder of 86.
Put 1 as the next digit of the answer. 
Result so far: 1811.0
If we take 399 away from 485, we end up with 86.
Fetch the next digit (5) from the dividend, attach it to 86 and continue: 865 / 399

On to step 7:
When dividing 865 by 399, we get 2 with a remainder of 67.
Write down 2 as next digit of the result. 
Result so far: 18112.0
Deduct 798 from 865 and we're left with 67.
Grab the next digit (1) from the dividend, add it to 67, then carry on: 671 / 399

Moving on to step 8:
399 can be fit into 671 1 times, resulting in a remainder of 272.
Record the quotient 1 as the next digit in the result. 
Result so far: 181121.0
Deduct 399 from 671 and we're left with 272.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

On to step 9:
If we divide 2720 by 399, we get 6 and a remainder of 326.
The number 6 becomes the next digit in our result. 
Result so far: 181121.6
If we subtract 2394 from 2720, we get 326.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3260, and continue the process.

Step 10:
When dividing 3260 by 399, we get 8 with a remainder of 68.
Put 8 as the next digit of the answer. 
Result so far: 181121.68
The remainder is 68 after subtracting 3192 from 3260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Going ahead to step 11:
If we divide 680 by 399, we get 1 and a remainder of 281.
The next digit of our result is 1. 
Result so far: 181121.681
Deduct 399 from 680 and we're left with 281.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2810, and continue the process.

Advancing to step 12:
The number 399 fits into 2810 7 times, leaving a remainder of 17.
Use 7 as the next digit of our solution. 
Result so far: 181121.6817
Subtract 2793 from 2810 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 13:
170 divided by 399 is 0 with a remainder of 170.
The number 0 becomes the next digit in our result. 
Result so far: 181121.6817
Deduct 0 from 170 and we're left with 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Advancing to step 14:
1700 divided by 399 is 4 with a remainder of 104.
Record the quotient 4 as the next digit in the result. 
Result so far: 181121.681704
Subtract 1596 from 1700 to get 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Going ahead to step 15:
If we divide 1040 by 399, we get 2 and a remainder of 242.
Record the quotient 2 as the next digit in the result. 
Result so far: 181121.6817042
Subtract 798 from 1040 to get 242.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2420, and continue the process.

On to step 16:
If we divide 2420 by 399, we get 6 and a remainder of 26.
Use 6 as the next digit of our solution. 
Result so far: 181121.68170426
The remainder is 26 after subtracting 2394 from 2420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

The quotient of the division is 181121.68170426, and the remainder is 2.6e-08.