12281285 ÷ 821 
The aim is to understand the frequency of 821 in 12281285.

Advancing to step 1:
1 divided by 821 is 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 821

On to step 2:
When dividing 12 by 821, we get 0 with a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 12 leaves us with 12.
Fetch the next digit (2) from the dividend, attach it to 12 and continue: 122 / 821

Advancing to step 3:
When dividing 122 by 821, we get 0 with a remainder of 122.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 122 leaves us with 122.
Take the next digit (8) from the dividend and append it to 122, then repeat: 1228 / 821

Going ahead to step 4:
If we divide 1228 by 821, we get 1 and a remainder of 407.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 407 after subtracting 821 from 1228.
Append the next digit (1) from the dividend to 407 and continue with: 4071 / 821

Moving on to step 5:
When dividing 4071 by 821, we get 4 with a remainder of 787.
Write down 4 as next digit of the result. 
Result so far: 14.0
If we take 3284 away from 4071, we end up with 787.
Grab the next digit (2) from the dividend, add it to 787, then carry on: 7872 / 821

Going ahead to step 6:
The number 821 fits into 7872 9 times, leaving a remainder of 483.
Use 9 as the next digit of our solution. 
Result so far: 149.0
Subtract 7389 from 7872 to get 483.
Take the next digit (8) from the dividend and append it to 483, then repeat: 4838 / 821

On to step 7:
When dividing 4838 by 821, we get 5 with a remainder of 733.
The number 5 becomes the next digit in our result. 
Result so far: 1495.0
Subtract 4105 from 4838 to get 733.
Fetch the next digit (5) from the dividend, attach it to 733 and continue: 7335 / 821

Going ahead to step 8:
821 goes into 7335 8 times with a remainder of 767.
Write down 8 as next digit of the result. 
Result so far: 14958.0
Subtract 6568 from 7335 to get 767.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7670, and continue the process.

Moving on to step 9:
821 goes into 7670 9 times with a remainder of 281.
Use 9 as the next digit of our solution. 
Result so far: 14958.9
Deduct 7389 from 7670 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.

On to step 10:
2810 divided by 821 is 3 with a remainder of 347.
Record the quotient 3 as the next digit in the result. 
Result so far: 14958.93
Deduct 2463 from 2810 and we're left with 347.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3470, and continue the process.

Step 11:
If we divide 3470 by 821, we get 4 and a remainder of 186.
Put 4 as the next digit of the answer. 
Result so far: 14958.934
Subtract 3284 from 3470 to get 186.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1860, and continue the process.

Moving on to step 12:
821 goes into 1860 2 times with a remainder of 218.
The number 2 becomes the next digit in our result. 
Result so far: 14958.9342
Subtract 1642 from 1860 to get 218.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2180, and continue the process.

Step 13:
821 can be fit into 2180 2 times, resulting in a remainder of 538.
The number 2 becomes the next digit in our result. 
Result so far: 14958.93422
Deduct 1642 from 2180 and we're left with 538.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5380, and continue the process.

In conclusion, the division gives 14958.93422 with a balance of 0.000538.