We look at the division of 87559830 by 800 
The aim is to understand the frequency of 800 in 87559830.

On to step 1:
When dividing 8 by 800, we get 0 with 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.
Include the next digit (7) from the dividend after 8, then repeat: 87 / 800

Moving on to step 2:
If we divide 87 by 800, we get 0 and a remainder of 87.
Put 0 as the next digit of the answer. 
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 / 800

Advancing to step 3:
The number 800 fits into 875 1 times, leaving a remainder of 75.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 800 from 875 to get 75.
Append the next digit (5) from the dividend to 75 and continue with: 755 / 800

On to step 4:
755 divided by 800 is 0 with a remainder of 755.
Write down 0 as next digit of the result. 
Result so far: 10.0
The remainder is 755 after subtracting 0 from 755.
Append the next digit (9) from the dividend to 755 and continue with: 7559 / 800

On to step 5:
7559 divided by 800 is 9 with a remainder of 359.
The number 9 becomes the next digit in our result. 
Result so far: 109.0
The remainder is 359 after subtracting 7200 from 7559.
Append the next digit (8) from the dividend to 359 and continue with: 3598 / 800

Let's proceed to step 6:
The number 800 fits into 3598 4 times, leaving a remainder of 398.
The next digit of our result is 4. 
Result so far: 1094.0
The remainder is 398 after subtracting 3200 from 3598.
Grab the next digit (3) from the dividend, add it to 398, then carry on: 3983 / 800

On to step 7:
If we divide 3983 by 800, we get 4 and a remainder of 783.
Record the quotient 4 as the next digit in the result. 
Result so far: 10944.0
Deduct 3200 from 3983 and we're left with 783.
Append the next digit (0) from the dividend to 783 and continue with: 7830 / 800

Moving on to step 8:
The number 800 fits into 7830 9 times, leaving a remainder of 630.
Write down 9 as next digit of the result. 
Result so far: 109449.0
If we take 7200 away from 7830, we end up with 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6300, and continue the process.

Going ahead to step 9:
800 goes into 6300 7 times with a remainder of 700.
Write down 7 as next digit of the result. 
Result so far: 109449.7
Subtract 5600 from 6300 to get 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7000, and continue the process.

Advancing to step 10:
7000 divided by 800 is 8 with a remainder of 600.
Write down 8 as next digit of the result. 
Result so far: 109449.78
Subtract 6400 from 7000 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.

Moving on to step 11:
When dividing 6000 by 800, we get 7 with a remainder of 400.
The next digit of our result is 7. 
Result so far: 109449.787
The remainder is 400 after subtracting 5600 from 6000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Let's proceed to step 12:
The number 800 fits into 4000 5 times, leaving a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 109449.7875
Deduct 4000 from 4000 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 13:
If we divide 0 by 800, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 109449.7875
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 14:
800 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 109449.7875
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 109449.7875, and the remainder is 0.0.