We divide 73819321 by 821
The aim is to understand the frequency of 821 in 73819321.

On to step 1:
The number 821 fits into 7 0 times, leaving a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Include the next digit (3) from the dividend after 7, then repeat: 73 / 821

Going ahead to step 2:
If we divide 73 by 821, we get 0 and a remainder of 73.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 73 leaves us with 73.
Fetch the next digit (8) from the dividend, attach it to 73 and continue: 738 / 821

Moving on to step 3:
When dividing 738 by 821, we get 0 with a remainder of 738.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 738, we get 738.
Fetch the next digit (1) from the dividend, attach it to 738 and continue: 7381 / 821

Going ahead to step 4:
When dividing 7381 by 821, we get 8 with a remainder of 813.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
The remainder is 813 after subtracting 6568 from 7381.
Include the next digit (9) from the dividend after 813, then repeat: 8139 / 821

On to step 5:
821 goes into 8139 9 times with a remainder of 750.
Record the quotient 9 as the next digit in the result. 
Result so far: 89.0
If we subtract 7389 from 8139, we get 750.
Take the next digit (3) from the dividend and append it to 750, then repeat: 7503 / 821

Moving on to step 6:
The number 821 fits into 7503 9 times, leaving a remainder of 114.
The next digit of our result is 9. 
Result so far: 899.0
If we take 7389 away from 7503, we end up with 114.
Take the next digit (2) from the dividend and append it to 114, then repeat: 1142 / 821

On to step 7:
When dividing 1142 by 821, we get 1 with a remainder of 321.
The number 1 becomes the next digit in our result. 
Result so far: 8991.0
The remainder is 321 after subtracting 821 from 1142.
Fetch the next digit (1) from the dividend, attach it to 321 and continue: 3211 / 821

Going ahead to step 8:
821 can be fit into 3211 3 times, resulting in a remainder of 748.
Record the quotient 3 as the next digit in the result. 
Result so far: 89913.0
The remainder is 748 after subtracting 2463 from 3211.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7480, and continue the process.

On to step 9:
When dividing 7480 by 821, we get 9 with a remainder of 91.
Record the quotient 9 as the next digit in the result. 
Result so far: 89913.9
If we subtract 7389 from 7480, we get 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

On to step 10:
910 divided by 821 is 1 with a remainder of 89.
The next digit of our result is 1. 
Result so far: 89913.91
Deduct 821 from 910 and we're left with 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Step 11:
890 divided by 821 is 1 with a remainder of 69.
The next digit of our result is 1. 
Result so far: 89913.911
If we subtract 821 from 890, we get 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

The final outcome is 89913.911, with a leftover of 0.0069.