40663112 ÷ 399 
The aim is to understand the frequency of 399 in 40663112.

Let's proceed to step 1:
399 can be fit into 4 0 times, resulting in a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Grab the next digit (0) from the dividend, add it to 4, then carry on: 40 / 399

Let's proceed to step 2:
If we divide 40 by 399, we get 0 and a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 40 to get 40.
Take the next digit (6) from the dividend and append it to 40, then repeat: 406 / 399

On to step 3:
When dividing 406 by 399, we get 1 with a remainder of 7.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 399 away from 406, we end up with 7.
Include the next digit (6) from the dividend after 7, then repeat: 76 / 399

Let's proceed to step 4:
399 goes into 76 0 times with a remainder of 76.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Deduct 0 from 76 and we're left with 76.
Fetch the next digit (3) from the dividend, attach it to 76 and continue: 763 / 399

On to step 5:
399 can be fit into 763 1 times, resulting in a remainder of 364.
The next digit of our result is 1. 
Result so far: 101.0
Deduct 399 from 763 and we're left with 364.
Fetch the next digit (1) from the dividend, attach it to 364 and continue: 3641 / 399

Step 6:
If we divide 3641 by 399, we get 9 and a remainder of 50.
Use 9 as the next digit of our solution. 
Result so far: 1019.0
Subtracting 3591 from 3641 leaves us with 50.
Include the next digit (1) from the dividend after 50, then repeat: 501 / 399

Step 7:
501 divided by 399 is 1 with a remainder of 102.
Put 1 as the next digit of the answer. 
Result so far: 10191.0
Subtracting 399 from 501 leaves us with 102.
Bring next digit (2) of the dividend behind the 102 and repeat the process: 1022 / 399

On to step 8:
When dividing 1022 by 399, we get 2 with a remainder of 224.
The number 2 becomes the next digit in our result. 
Result so far: 101912.0
If we subtract 798 from 1022, we get 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Let's proceed to step 9:
2240 divided by 399 is 5 with a remainder of 245.
Use 5 as the next digit of our solution. 
Result so far: 101912.5
Deduct 1995 from 2240 and we're left with 245.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2450, and continue the process.

Going ahead to step 10:
If we divide 2450 by 399, we get 6 and a remainder of 56.
The next digit of our result is 6. 
Result so far: 101912.56
Deduct 2394 from 2450 and we're left with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Moving on to step 11:
When dividing 560 by 399, we get 1 with a remainder of 161.
Use 1 as the next digit of our solution. 
Result so far: 101912.561
If we subtract 399 from 560, we get 161.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1610, and continue the process.

Let's proceed to step 12:
399 goes into 1610 4 times with a remainder of 14.
The number 4 becomes the next digit in our result. 
Result so far: 101912.5614
Deduct 1596 from 1610 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 13:
140 divided by 399 is 0 with a remainder of 140.
Use 0 as the next digit of our solution. 
Result so far: 101912.5614
If we subtract 0 from 140, we get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

On to step 14:
399 goes into 1400 3 times with a remainder of 203.
Put 3 as the next digit of the answer. 
Result so far: 101912.561403
If we subtract 1197 from 1400, we get 203.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2030, and continue the process.

On to step 15:
When dividing 2030 by 399, we get 5 with a remainder of 35.
Use 5 as the next digit of our solution. 
Result so far: 101912.5614035
Subtract 1995 from 2030 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Step 16:
350 divided by 399 is 0 with a remainder of 350.
The next digit of our result is 0. 
Result so far: 101912.5614035
Deduct 0 from 350 and we're left with 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

The quotient of the division is 101912.5614035, and the remainder is 3.5e-07.