81634038 divided by 840 
The aim is to understand the frequency of 840 in 81634038.

On to step 1:
8 divided by 840 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 840

On to step 2:
81 divided by 840 is 0 with a remainder of 81.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 81 after subtracting 0 from 81.
Append the next digit (6) from the dividend to 81 and continue with: 816 / 840

On to step 3:
When dividing 816 by 840, we get 0 with a remainder of 816.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 816, we get 816.
Fetch the next digit (3) from the dividend, attach it to 816 and continue: 8163 / 840

Step 4:
840 can be fit into 8163 9 times, resulting in a remainder of 603.
The next digit of our result is 9. 
Result so far: 9.0
Subtract 7560 from 8163 to get 603.
Bring next digit (4) of the dividend behind the 603 and repeat the process: 6034 / 840

Let's proceed to step 5:
6034 divided by 840 is 7 with a remainder of 154.
Write down 7 as next digit of the result. 
Result so far: 97.0
Deduct 5880 from 6034 and we're left with 154.
Grab the next digit (0) from the dividend, add it to 154, then carry on: 1540 / 840

Step 6:
When dividing 1540 by 840, we get 1 with a remainder of 700.
Put 1 as the next digit of the answer. 
Result so far: 971.0
Deduct 840 from 1540 and we're left with 700.
Bring next digit (3) of the dividend behind the 700 and repeat the process: 7003 / 840

Moving on to step 7:
840 goes into 7003 8 times with a remainder of 283.
Record the quotient 8 as the next digit in the result. 
Result so far: 9718.0
The remainder is 283 after subtracting 6720 from 7003.
Fetch the next digit (8) from the dividend, attach it to 283 and continue: 2838 / 840

Moving on to step 8:
If we divide 2838 by 840, we get 3 and a remainder of 318.
Record the quotient 3 as the next digit in the result. 
Result so far: 97183.0
Subtract 2520 from 2838 to get 318.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3180, and continue the process.

Step 9:
When dividing 3180 by 840, we get 3 with a remainder of 660.
Put 3 as the next digit of the answer. 
Result so far: 97183.3
If we subtract 2520 from 3180, we get 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6600, and continue the process.

Step 10:
When dividing 6600 by 840, we get 7 with a remainder of 720.
Use 7 as the next digit of our solution. 
Result so far: 97183.37
Subtract 5880 from 6600 to get 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7200, and continue the process.

Going ahead to step 11:
840 goes into 7200 8 times with a remainder of 480.
The next digit of our result is 8. 
Result so far: 97183.378
If we subtract 6720 from 7200, we get 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Advancing to step 12:
840 can be fit into 4800 5 times, resulting in a remainder of 600.
The number 5 becomes the next digit in our result. 
Result so far: 97183.3785
The remainder is 600 after subtracting 4200 from 4800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Advancing to step 13:
The number 840 fits into 6000 7 times, leaving a remainder of 120.
Write down 7 as next digit of the result. 
Result so far: 97183.37857
Deduct 5880 from 6000 and we're left with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Step 14:
840 goes into 1200 1 times with a remainder of 360.
Use 1 as the next digit of our solution. 
Result so far: 97183.378571
Deduct 840 from 1200 and we're left with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Advancing to step 15:
The number 840 fits into 3600 4 times, leaving a remainder of 240.
The number 4 becomes the next digit in our result. 
Result so far: 97183.3785714
The remainder is 240 after subtracting 3360 from 3600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Let's proceed to step 16:
When dividing 2400 by 840, we get 2 with a remainder of 720.
The number 2 becomes the next digit in our result. 
Result so far: 97183.37857142
Deduct 1680 from 2400 and we're left with 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7200, and continue the process.

The quotient of the division is 97183.37857142, and the remainder is 7.2e-07.