81845436 ÷ 810 
The aim is to understand the frequency of 810 in 81845436.

Advancing to step 1:
The number 810 fits into 8 0 times, leaving a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 810

Step 2:
When dividing 81 by 810, we get 0 with a remainder of 81.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 81, we get 81.
Take the next digit (8) from the dividend and append it to 81, then repeat: 818 / 810

Advancing to step 3:
818 divided by 810 is 1 with a remainder of 8.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 810 away from 818, we end up with 8.
Include the next digit (4) from the dividend after 8, then repeat: 84 / 810

On to step 4:
If we divide 84 by 810, we get 0 and a remainder of 84.
Write down 0 as next digit of the result. 
Result so far: 10.0
Subtract 0 from 84 to get 84.
Bring next digit (5) of the dividend behind the 84 and repeat the process: 845 / 810

Going ahead to step 5:
If we divide 845 by 810, we get 1 and a remainder of 35.
Use 1 as the next digit of our solution. 
Result so far: 101.0
Subtract 810 from 845 to get 35.
Include the next digit (4) from the dividend after 35, then repeat: 354 / 810

Let's proceed to step 6:
810 goes into 354 0 times with a remainder of 354.
The next digit of our result is 0. 
Result so far: 1010.0
Deduct 0 from 354 and we're left with 354.
Include the next digit (3) from the dividend after 354, then repeat: 3543 / 810

Going ahead to step 7:
3543 divided by 810 is 4 with a remainder of 303.
Put 4 as the next digit of the answer. 
Result so far: 10104.0
Subtracting 3240 from 3543 leaves us with 303.
Take the next digit (6) from the dividend and append it to 303, then repeat: 3036 / 810

Going ahead to step 8:
When dividing 3036 by 810, we get 3 with a remainder of 606.
The next digit of our result is 3. 
Result so far: 101043.0
If we subtract 2430 from 3036, we get 606.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6060, and continue the process.

Moving on to step 9:
When dividing 6060 by 810, we get 7 with a remainder of 390.
Put 7 as the next digit of the answer. 
Result so far: 101043.7
Deduct 5670 from 6060 and we're left with 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

Going ahead to step 10:
The number 810 fits into 3900 4 times, leaving a remainder of 660.
Put 4 as the next digit of the answer. 
Result so far: 101043.74
If we take 3240 away from 3900, we end up with 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6600, and continue the process.

Going ahead to step 11:
810 goes into 6600 8 times with a remainder of 120.
Record the quotient 8 as the next digit in the result. 
Result so far: 101043.748
If we take 6480 away from 6600, we end up 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.

Advancing to step 12:
810 can be fit into 1200 1 times, resulting in a remainder of 390.
The next digit of our result is 1. 
Result so far: 101043.7481
If we subtract 810 from 1200, we get 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

On to step 13:
The number 810 fits into 3900 4 times, leaving a remainder of 660.
Record the quotient 4 as the next digit in the result. 
Result so far: 101043.74814
Subtract 3240 from 3900 to 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.

Moving on to step 14:
If we divide 6600 by 810, we get 8 and a remainder of 120.
Write down 8 as next digit of the result. 
Result so far: 101043.748148
Subtracting 6480 from 6600 leaves us 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 15:
810 goes into 1200 1 times with a remainder of 390.
Use 1 as the next digit of our solution. 
Result so far: 101043.7481481
If we subtract 810 from 1200, we get 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

Step 16:
The number 810 fits into 3900 4 times, leaving a remainder of 660.
Use 4 as the next digit of our solution. 
Result so far: 101043.74814814
Subtract 3240 from 3900 to 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.

The final outcome is 101043.74814814, with a leftover of 6.6e-07.