87528739 ÷ 810 
The aim is to understand the frequency of 810 in 87528739.

Moving on to step 1:
8 divided by 810 is 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 810

Step 2:
The number 810 fits into 87 0 times, leaving a remainder of 87.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 87 and we're left with 87.
Take the next digit (5) from the dividend and append it to 87, then repeat: 875 / 810

On to step 3:
If we divide 875 by 810, we get 1 and a remainder of 65.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 810 away from 875, we end up with 65.
Include the next digit (2) from the dividend after 65, then repeat: 652 / 810

Step 4:
810 can be fit into 652 0 times, resulting in a remainder of 652.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
If we take 0 away from 652, we end up with 652.
Take the next digit (8) from the dividend and append it to 652, then repeat: 6528 / 810

Moving on to step 5:
The number 810 fits into 6528 8 times, leaving a remainder of 48.
The next digit of our result is 8. 
Result so far: 108.0
Subtracting 6480 from 6528 leaves us with 48.
Include the next digit (7) from the dividend after 48, then repeat: 487 / 810

Moving on to step 6:
The number 810 fits into 487 0 times, leaving a remainder of 487.
Put 0 as the next digit of the answer. 
Result so far: 1080.0
If we take 0 away from 487, we end up with 487.
Take the next digit (3) from the dividend and append it to 487, then repeat: 4873 / 810

On to step 7:
4873 divided by 810 is 6 with a remainder of 13.
Write down 6 as next digit of the result. 
Result so far: 10806.0
If we take 4860 away from 4873, we end up with 13.
Append the next digit (9) from the dividend to 13 and continue with: 139 / 810

Let's proceed to step 8:
If we divide 139 by 810, we get 0 and a remainder of 139.
Put 0 as the next digit of the answer. 
Result so far: 108060.0
Deduct 0 from 139 and we're left with 139.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1390, and continue the process.

On to step 9:
The number 810 fits into 1390 1 times, leaving a remainder of 580.
Put 1 as the next digit of the answer. 
Result so far: 108060.1
Subtract 810 from 1390 to get 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

On to step 10:
If we divide 5800 by 810, we get 7 and a remainder of 130.
The number 7 becomes the next digit in our result. 
Result so far: 108060.17
Deduct 5670 from 5800 and we're left with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Let's proceed to step 11:
When dividing 1300 by 810, we get 1 with a remainder of 490.
The number 1 becomes the next digit in our result. 
Result so far: 108060.171
If we take 810 away from 1300, we end up with 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4900, and continue the process.

Let's proceed to step 12:
810 can be fit into 4900 6 times, resulting in a remainder of 40.
Write down 6 as next digit of the result. 
Result so far: 108060.1716
If we subtract 4860 from 4900, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 13:
400 divided by 810 is 0 with a remainder of 400.
The next digit of our result is 0. 
Result so far: 108060.1716
The remainder is 400 after subtracting 0 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Advancing to step 14:
When dividing 4000 by 810, we get 4 with a remainder of 760.
The number 4 becomes the next digit in our result. 
Result so far: 108060.171604
Subtracting 3240 from 4000 leaves us with 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7600, and continue the process.

Advancing to step 15:
810 can be fit into 7600 9 times, resulting in a remainder of 310.
Put 9 as the next digit of the answer. 
Result so far: 108060.1716049
Deduct 7290 from 7600 and we're left with 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3100, and continue the process.

Let's proceed to step 16:
If we divide 3100 by 810, we get 3 and a remainder of 670.
The number 3 becomes the next digit in our result. 
Result so far: 108060.17160493
If we subtract 2430 from 3100, we get 670.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6700, and continue the process.

The final result is 108060.17160493 with a remainder of 6.7e-07.