79112112 ÷ 646 
The aim is to understand the frequency of 646 in 79112112.

Step 1:
646 can be fit into 7 0 times, resulting in a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Grab the next digit (9) from the dividend, add it to 7, then carry on: 79 / 646

Step 2:
646 can be fit into 79 0 times, resulting in a remainder of 79.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 79 leaves us with 79.
Fetch the next digit (1) from the dividend, attach it to 79 and continue: 791 / 646

Going ahead to step 3:
646 can be fit into 791 1 times, resulting in a remainder of 145.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 646 from 791 leaves us with 145.
Append the next digit (1) from the dividend to 145 and continue with: 1451 / 646

On to step 4:
646 goes into 1451 2 times with a remainder of 159.
The next digit of our result is 2. 
Result so far: 12.0
Deduct 1292 from 1451 and we're left with 159.
Grab the next digit (2) from the dividend, add it to 159, then carry on: 1592 / 646

Let's proceed to step 5:
The number 646 fits into 1592 2 times, leaving a remainder of 300.
Use 2 as the next digit of our solution. 
Result so far: 122.0
Subtract 1292 from 1592 to get 300.
Include the next digit (1) from the dividend after 300, then repeat: 3001 / 646

On to step 6:
When dividing 3001 by 646, we get 4 with a remainder of 417.
The next digit of our result is 4. 
Result so far: 1224.0
Subtract 2584 from 3001 to get 417.
Take the next digit (1) from the dividend and append it to 417, then repeat: 4171 / 646

Moving on to step 7:
If we divide 4171 by 646, we get 6 and a remainder of 295.
Put 6 as the next digit of the answer. 
Result so far: 12246.0
Subtract 3876 from 4171 to get 295.
Append the next digit (2) from the dividend to 295 and continue with: 2952 / 646

Advancing to step 8:
646 can be fit into 2952 4 times, resulting in a remainder of 368.
Write down 4 as next digit of the result. 
Result so far: 122464.0
Deduct 2584 from 2952 and we're left with 368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3680, and continue the process.

Let's proceed to step 9:
When dividing 3680 by 646, we get 5 with a remainder of 450.
Record the quotient 5 as the next digit in the result. 
Result so far: 122464.5
If we take 3230 away from 3680, we end up with 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

Going ahead to step 10:
4500 divided by 646 is 6 with a remainder of 624.
Put 6 as the next digit of the answer. 
Result so far: 122464.56
If we subtract 3876 from 4500, we get 624.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6240, and continue the process.

Moving on to step 11:
646 can be fit into 6240 9 times, resulting in a remainder of 426.
Put 9 as the next digit of the answer. 
Result so far: 122464.569
Subtract 5814 from 6240 to get 426.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4260, and continue the process.

Moving on to step 12:
The number 646 fits into 4260 6 times, leaving a remainder of 384.
Use 6 as the next digit of our solution. 
Result so far: 122464.5696
Subtracting 3876 from 4260 leaves us with 384.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3840, and continue the process.

Moving on to step 13:
The number 646 fits into 3840 5 times, leaving a remainder of 610.
Record the quotient 5 as the next digit in the result. 
Result so far: 122464.56965
Subtracting 3230 from 3840 leaves us with 610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6100, and continue the process.

Let's proceed to step 14:
646 can be fit into 6100 9 times, resulting in a remainder of 286.
Record the quotient 9 as the next digit in the result. 
Result so far: 122464.569659
Subtract 5814 from 6100 to get 286.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2860, and continue the process.

Moving on to step 15:
2860 divided by 646 is 4 with a remainder of 276.
Put 4 as the next digit of the answer. 
Result so far: 122464.5696594
If we take 2584 away from 2860, we end up with 276.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2760, and continue the process.

Step 16:
646 can be fit into 2760 4 times, resulting in a remainder of 176.
Write down 4 as next digit of the result. 
Result so far: 122464.56965944
The remainder is 176 after subtracting 2584 from 2760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

After the division, we end up with 122464.56965944 and a remainder of 1.76e-07.