19812128 divided by 870 
The aim is to understand the frequency of 870 in 19812128.

On to step 1:
870 goes into 1 0 times with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 870

Moving on to step 2:
870 goes into 19 0 times with a remainder of 19.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 19 to get 19.
Include the next digit (8) from the dividend after 19, then repeat: 198 / 870

Moving on to step 3:
198 divided by 870 is 0 with a remainder of 198.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 198 and we're left with 198.
Bring next digit (1) of the dividend behind the 198 and repeat the process: 1981 / 870

Going ahead to step 4:
870 goes into 1981 2 times with a remainder of 241.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtracting 1740 from 1981 leaves us with 241.
Include the next digit (2) from the dividend after 241, then repeat: 2412 / 870

Advancing to step 5:
When dividing 2412 by 870, we get 2 with a remainder of 672.
The number 2 becomes the next digit in our result. 
Result so far: 22.0
The remainder is 672 after subtracting 1740 from 2412.
Include the next digit (1) from the dividend after 672, then repeat: 6721 / 870

Going ahead to step 6:
If we divide 6721 by 870, we get 7 and a remainder of 631.
The next digit of our result is 7. 
Result so far: 227.0
If we take 6090 away from 6721, we end up with 631.
Fetch the next digit (2) from the dividend, attach it to 631 and continue: 6312 / 870

On to step 7:
The number 870 fits into 6312 7 times, leaving a remainder of 222.
Record the quotient 7 as the next digit in the result. 
Result so far: 2277.0
The remainder is 222 after subtracting 6090 from 6312.
Fetch the next digit (8) from the dividend, attach it to 222 and continue: 2228 / 870

On to step 8:
The number 870 fits into 2228 2 times, leaving a remainder of 488.
The next digit of our result is 2. 
Result so far: 22772.0
If we take 1740 away from 2228, we end up with 488.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4880, and continue the process.

Let's proceed to step 9:
870 can be fit into 4880 5 times, resulting in a remainder of 530.
Record the quotient 5 as the next digit in the result. 
Result so far: 22772.5
Subtracting 4350 from 4880 leaves us with 530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5300, and continue the process.

Going ahead to step 10:
870 can be fit into 5300 6 times, resulting in a remainder of 80.
Use 6 as the next digit of our solution. 
Result so far: 22772.56
Subtracting 5220 from 5300 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 11:
800 divided by 870 is 0 with a remainder of 800.
Write down 0 as next digit of the result. 
Result so far: 22772.56
If we take 0 away from 800, we end up with 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8000, and continue the process.

Let's proceed to step 12:
If we divide 8000 by 870, we get 9 and a remainder of 170.
Use 9 as the next digit of our solution. 
Result so far: 22772.5609
If we subtract 7830 from 8000, we get 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Going ahead to step 13:
The number 870 fits into 1700 1 times, leaving a remainder of 830.
The number 1 becomes the next digit in our result. 
Result so far: 22772.56091
If we take 870 away from 1700, we end up with 830.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8300, and continue the process.

On to step 14:
870 goes into 8300 9 times with a remainder of 470.
Write down 9 as next digit of the result. 
Result so far: 22772.560919
Deduct 7830 from 8300 and we're left with 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4700, and continue the process.

Moving on to step 15:
870 can be fit into 4700 5 times, resulting in a remainder of 350.
Use 5 as the next digit of our solution. 
Result so far: 22772.5609195
The remainder is 350 after subtracting 4350 from 4700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

Let's proceed to step 16:
The number 870 fits into 3500 4 times, leaving a remainder of 20.
Write down 4 as next digit of the result. 
Result so far: 22772.56091954
If we take 3480 away from 3500, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final outcome is 22772.56091954, with a leftover of 2e-08.