81591806 divided by 684 
The aim is to understand the frequency of 684 in 81591806.

Let's proceed to step 1:
If we divide 8 by 684, we get 0 and a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 684

Let's proceed to step 2:
If we divide 81 by 684, we get 0 and a remainder of 81.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 81 after subtracting 0 from 81.
Fetch the next digit (5) from the dividend, attach it to 81 and continue: 815 / 684

On to step 3:
684 can be fit into 815 1 times, resulting in a remainder of 131.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 684 from 815 to get 131.
Append the next digit (9) from the dividend to 131 and continue with: 1319 / 684

Let's proceed to step 4:
The number 684 fits into 1319 1 times, leaving a remainder of 635.
Use 1 as the next digit of our solution. 
Result so far: 11.0
The remainder is 635 after subtracting 684 from 1319.
Take the next digit (1) from the dividend and append it to 635, then repeat: 6351 / 684

Let's proceed to step 5:
The number 684 fits into 6351 9 times, leaving a remainder of 195.
The next digit of our result is 9. 
Result so far: 119.0
If we subtract 6156 from 6351, we get 195.
Bring next digit (8) of the dividend behind the 195 and repeat the process: 1958 / 684

Moving on to step 6:
If we divide 1958 by 684, we get 2 and a remainder of 590.
Record the quotient 2 as the next digit in the result. 
Result so far: 1192.0
If we take 1368 away from 1958, we end up with 590.
Bring next digit (0) of the dividend behind the 590 and repeat the process: 5900 / 684

Let's proceed to step 7:
5900 divided by 684 is 8 with a remainder of 428.
Put 8 as the next digit of the answer. 
Result so far: 11928.0
Subtracting 5472 from 5900 leaves us with 428.
Append the next digit (6) from the dividend to 428 and continue with: 4286 / 684

Advancing to step 8:
684 goes into 4286 6 times with a remainder of 182.
The next digit of our result is 6. 
Result so far: 119286.0
Subtract 4104 from 4286 to get 182.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

Let's proceed to step 9:
The number 684 fits into 1820 2 times, leaving a remainder of 452.
Record the quotient 2 as the next digit in the result. 
Result so far: 119286.2
The remainder is 452 after subtracting 1368 from 1820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4520, and continue the process.

Advancing to step 10:
684 goes into 4520 6 times with a remainder of 416.
The number 6 becomes the next digit in our result. 
Result so far: 119286.26
If we take 4104 away from 4520, we end up with 416.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4160, and continue the process.

Going ahead to step 11:
When dividing 4160 by 684, we get 6 with a remainder of 56.
Put 6 as the next digit of the answer. 
Result so far: 119286.266
If we subtract 4104 from 4160, we get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

The quotient of the division is 119286.266, and the remainder is 0.0056.