We divide 81135351 by 840
The aim is to understand the frequency of 840 in 81135351.

Step 1:
840 can be fit into 8 0 times, resulting in a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 840

On to step 2:
840 can be fit into 81 0 times, resulting in a remainder of 81.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 81, we get 81.
Grab the next digit (1) from the dividend, add it to 81, then carry on: 811 / 840

Advancing to step 3:
811 divided by 840 is 0 with a remainder of 811.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 811 to get 811.
Bring next digit (3) of the dividend behind the 811 and repeat the process: 8113 / 840

On to step 4:
When dividing 8113 by 840, we get 9 with a remainder of 553.
Use 9 as the next digit of our solution. 
Result so far: 9.0
The remainder is 553 after subtracting 7560 from 8113.
Include the next digit (5) from the dividend after 553, then repeat: 5535 / 840

On to step 5:
If we divide 5535 by 840, we get 6 and a remainder of 495.
Write down 6 as next digit of the result. 
Result so far: 96.0
Subtract 5040 from 5535 to get 495.
Bring next digit (3) of the dividend behind the 495 and repeat the process: 4953 / 840

Step 6:
If we divide 4953 by 840, we get 5 and a remainder of 753.
The next digit of our result is 5. 
Result so far: 965.0
Subtracting 4200 from 4953 leaves us with 753.
Take the next digit (5) from the dividend and append it to 753, then repeat: 7535 / 840

Let's proceed to step 7:
7535 divided by 840 is 8 with a remainder of 815.
The next digit of our result is 8. 
Result so far: 9658.0
If we subtract 6720 from 7535, we get 815.
Append the next digit (1) from the dividend to 815 and continue with: 8151 / 840

Going ahead to step 8:
840 can be fit into 8151 9 times, resulting in a remainder of 591.
Write down 9 as next digit of the result. 
Result so far: 96589.0
Deduct 7560 from 8151 and we're left with 591.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5910, and continue the process.

Going ahead to step 9:
840 goes into 5910 7 times with a remainder of 30.
Record the quotient 7 as the next digit in the result. 
Result so far: 96589.7
The remainder is 30 after subtracting 5880 from 5910.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 10:
The number 840 fits into 300 0 times, leaving a remainder of 300.
Put 0 as the next digit of the answer. 
Result so far: 96589.7
Deduct 0 from 300 and we're left with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

On to step 11:
3000 divided by 840 is 3 with a remainder of 480.
Write down 3 as next digit of the result. 
Result so far: 96589.703
If we subtract 2520 from 3000, 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:
4800 divided by 840 is 5 with a remainder of 600.
The number 5 becomes the next digit in our result. 
Result so far: 96589.7035
Subtract 4200 from 4800 to get 600.
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.
The number 7 becomes the next digit in our result. 
Result so far: 96589.70357
If we subtract 5880 from 6000, we get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

On to step 14:
The number 840 fits into 1200 1 times, leaving a remainder of 360.
Put 1 as the next digit of the answer. 
Result so far: 96589.703571
Subtract 840 from 1200 to get 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Moving on to step 15:
3600 divided by 840 is 4 with a remainder of 240.
Use 4 as the next digit of our solution. 
Result so far: 96589.7035714
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.

Going ahead to step 16:
If we divide 2400 by 840, we get 2 and a remainder of 720.
Use 2 as the next digit of our solution. 
Result so far: 96589.70357142
The remainder is 720 after subtracting 1680 from 2400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7200, and continue the process.

Our division results in 96589.70357142 with a remaining 7.2e-07.