Let's divide 87124241 by 869
The aim is to understand the frequency of 869 in 87124241.

Let's proceed to step 1:
8 divided by 869 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.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 869

On to step 2:
87 divided by 869 is 0 with a remainder of 87.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 87 to get 87.
Grab the next digit (1) from the dividend, add it to 87, then carry on: 871 / 869

Advancing to step 3:
869 goes into 871 1 times with a remainder of 2.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 869 from 871 to get 2.
Fetch the next digit (2) from the dividend, attach it to 2 and continue: 22 / 869

Moving on to step 4:
When dividing 22 by 869, we get 0 with a remainder of 22.
Use 0 as the next digit of our solution. 
Result so far: 10.0
Deduct 0 from 22 and we're left with 22.
Bring next digit (4) of the dividend behind the 22 and repeat the process: 224 / 869

On to step 5:
If we divide 224 by 869, we get 0 and a remainder of 224.
Record the quotient 0 as the next digit in the result. 
Result so far: 100.0
If we take 0 away from 224, we end up with 224.
Fetch the next digit (2) from the dividend, attach it to 224 and continue: 2242 / 869

Step 6:
If we divide 2242 by 869, we get 2 and a remainder of 504.
Write down 2 as next digit of the result. 
Result so far: 1002.0
Subtracting 1738 from 2242 leaves us with 504.
Bring next digit (4) of the dividend behind the 504 and repeat the process: 5044 / 869

On to step 7:
If we divide 5044 by 869, we get 5 and a remainder of 699.
Put 5 as the next digit of the answer. 
Result so far: 10025.0
Subtract 4345 from 5044 to get 699.
Grab the next digit (1) from the dividend, add it to 699, then carry on: 6991 / 869

Advancing to step 8:
The number 869 fits into 6991 8 times, leaving a remainder of 39.
Record the quotient 8 as the next digit in the result. 
Result so far: 100258.0
If we subtract 6952 from 6991, we get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

On to step 9:
If we divide 390 by 869, we get 0 and a remainder of 390.
The number 0 becomes the next digit in our result. 
Result so far: 100258.0
Subtract 0 from 390 to 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 10:
The number 869 fits into 3900 4 times, leaving a remainder of 424.
Record the quotient 4 as the next digit in the result. 
Result so far: 100258.04
Subtract 3476 from 3900 to get 424.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4240, and continue the process.

On to step 11:
4240 divided by 869 is 4 with a remainder of 764.
Use 4 as the next digit of our solution. 
Result so far: 100258.044
Deduct 3476 from 4240 and we're left with 764.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7640, and continue the process.

The quotient of the division is 100258.044, and the remainder is 0.0764.