Let's divide 79812382 by 821
The aim is to understand the frequency of 821 in 79812382.

On to step 1:
When dividing 7 by 821, we get 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Bring next digit (9) of the dividend behind the 7 and repeat the process: 79 / 821

Moving on to step 2:
821 goes into 79 0 times with a remainder of 79.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 79 leaves us with 79.
Include the next digit (8) from the dividend after 79, then repeat: 798 / 821

On to step 3:
If we divide 798 by 821, we get 0 and a remainder of 798.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 798 and we're left with 798.
Take the next digit (1) from the dividend and append it to 798, then repeat: 7981 / 821

Going ahead to step 4:
7981 divided by 821 is 9 with a remainder of 592.
Put 9 as the next digit of the answer. 
Result so far: 9.0
If we subtract 7389 from 7981, we get 592.
Append the next digit (2) from the dividend to 592 and continue with: 5922 / 821

Going ahead to step 5:
821 goes into 5922 7 times with a remainder of 175.
The next digit of our result is 7. 
Result so far: 97.0
Subtract 5747 from 5922 to get 175.
Include the next digit (3) from the dividend after 175, then repeat: 1753 / 821

Going ahead to step 6:
821 can be fit into 1753 2 times, resulting in a remainder of 111.
The next digit of our result is 2. 
Result so far: 972.0
Subtracting 1642 from 1753 leaves us with 111.
Append the next digit (8) from the dividend to 111 and continue with: 1118 / 821

Advancing to step 7:
The number 821 fits into 1118 1 times, leaving a remainder of 297.
Write down 1 as next digit of the result. 
Result so far: 9721.0
Subtracting 821 from 1118 leaves us with 297.
Take the next digit (2) from the dividend and append it to 297, then repeat: 2972 / 821

Moving on to step 8:
2972 divided by 821 is 3 with a remainder of 509.
The number 3 becomes the next digit in our result. 
Result so far: 97213.0
Subtract 2463 from 2972 to get 509.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5090, and continue the process.

On to step 9:
The number 821 fits into 5090 6 times, leaving a remainder of 164.
The next digit of our result is 6. 
Result so far: 97213.6
Subtracting 4926 from 5090 leaves us with 164.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

On to step 10:
If we divide 1640 by 821, we get 1 and a remainder of 819.
Record the quotient 1 as the next digit in the result. 
Result so far: 97213.61
If we take 821 away from 1640, we end up with 819.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8190, and continue the process.

Advancing to step 11:
821 goes into 8190 9 times with a remainder of 801.
Write down 9 as next digit of the result. 
Result so far: 97213.619
Subtracting 7389 from 8190 leaves us with 801.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8010, and continue the process.

On to step 12:
When dividing 8010 by 821, we get 9 with a remainder of 621.
Use 9 as the next digit of our solution. 
Result so far: 97213.6199
Deduct 7389 from 8010 and we're left with 621.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6210, and continue the process.

The quotient of the division is 97213.6199, and the remainder is 0.00621.