81618172 ÷ 456 
The aim is to understand the frequency of 456 in 81618172.

On to step 1:
8 divided by 456 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 456

Moving on to step 2:
81 divided by 456 is 0 with a remainder of 81.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 81, we get 81.
Include the next digit (6) from the dividend after 81, then repeat: 816 / 456

On to step 3:
816 divided by 456 is 1 with a remainder of 360.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 456 from 816 and we're left with 360.
Append the next digit (1) from the dividend to 360 and continue with: 3601 / 456

Step 4:
If we divide 3601 by 456, we get 7 and a remainder of 409.
Record the quotient 7 as the next digit in the result. 
Result so far: 17.0
The remainder is 409 after subtracting 3192 from 3601.
Take the next digit (8) from the dividend and append it to 409, then repeat: 4098 / 456

Step 5:
When dividing 4098 by 456, we get 8 with a remainder of 450.
Put 8 as the next digit of the answer. 
Result so far: 178.0
If we subtract 3648 from 4098, we get 450.
Take the next digit (1) from the dividend and append it to 450, then repeat: 4501 / 456

Step 6:
4501 divided by 456 is 9 with a remainder of 397.
The next digit of our result is 9. 
Result so far: 1789.0
The remainder is 397 after subtracting 4104 from 4501.
Grab the next digit (7) from the dividend, add it to 397, then carry on: 3977 / 456

On to step 7:
The number 456 fits into 3977 8 times, leaving a remainder of 329.
Record the quotient 8 as the next digit in the result. 
Result so far: 17898.0
The remainder is 329 after subtracting 3648 from 3977.
Take the next digit (2) from the dividend and append it to 329, then repeat: 3292 / 456

Advancing to step 8:
456 goes into 3292 7 times with a remainder of 100.
Write down 7 as next digit of the result. 
Result so far: 178987.0
The remainder is 100 after subtracting 3192 from 3292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Let's proceed to step 9:
The number 456 fits into 1000 2 times, leaving a remainder of 88.
Put 2 as the next digit of the answer. 
Result so far: 178987.2
If we take 912 away from 1000, we end up with 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Let's proceed to step 10:
456 can be fit into 880 1 times, resulting in a remainder of 424.
Write down 1 as next digit of the result. 
Result so far: 178987.21
The remainder is 424 after subtracting 456 from 880.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4240, and continue the process.

Going ahead to step 11:
456 can be fit into 4240 9 times, resulting in a remainder of 136.
The next digit of our result is 9. 
Result so far: 178987.219
If we take 4104 away from 4240, we end up with 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Going ahead to step 12:
456 can be fit into 1360 2 times, resulting in a remainder of 448.
The next digit of our result is 2. 
Result so far: 178987.2192
Subtracting 912 from 1360 leaves us with 448.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4480, and continue the process.

Going ahead to step 13:
456 goes into 4480 9 times with a remainder of 376.
Write down 9 as next digit of the result. 
Result so far: 178987.21929
Subtract 4104 from 4480 to get 376.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3760, and continue the process.

On to step 14:
When dividing 3760 by 456, we get 8 with a remainder of 112.
Record the quotient 8 as the next digit in the result. 
Result so far: 178987.219298
If we take 3648 away from 3760, we end up with 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Step 15:
456 goes into 1120 2 times with a remainder of 208.
The next digit of our result is 2. 
Result so far: 178987.2192982
If we take 912 away from 1120, we end up with 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

On to step 16:
The number 456 fits into 2080 4 times, leaving a remainder of 256.
Put 4 as the next digit of the answer. 
Result so far: 178987.21929824
If we take 1824 away from 2080, we end up with 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

After the division, we end up with 178987.21929824 and a remainder of 2.56e-07.