87100785 divided by 4 
The aim is to understand the frequency of 4 in 87100785.

Let's proceed to step 1:
When dividing 8 by 4, we get 2 with a remainder of 0.
The next digit of our result is 2. 
Result so far: 2.0
Subtract 8 from 8 to get 0.
Take the next digit (7) from the dividend and append it to 0, then repeat: 7 / 4

Moving on to step 2:
4 goes into 7 1 times with a remainder of 3.
Use 1 as the next digit of our solution. 
Result so far: 21.0
Subtracting 4 from 7 leaves us with 3.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 4

Going ahead to step 3:
The number 4 fits into 31 7 times, leaving a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 217.0
Subtracting 28 from 31 leaves us with 3.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 4

Advancing to step 4:
30 divided by 4 is 7 with a remainder of 2.
Write down 7 as next digit of the result. 
Result so far: 2177.0
If we take 28 away from 30, we end up with 2.
Fetch the next digit (0) from the dividend, attach it to 2 and continue: 20 / 4

Step 5:
The number 4 fits into 20 5 times, leaving a remainder of 0.
The next digit of our result is 5. 
Result so far: 21775.0
If we subtract 20 from 20, we get 0.
Append the next digit (7) from the dividend to 0 and continue with: 7 / 4

Going ahead to step 6:
When dividing 7 by 4, we get 1 with a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 217751.0
Subtract 4 from 7 to get 3.
Append the next digit (8) from the dividend to 3 and continue with: 38 / 4

Going ahead to step 7:
When dividing 38 by 4, we get 9 with a remainder of 2.
Record the quotient 9 as the next digit in the result. 
Result so far: 2177519.0
If we subtract 36 from 38, we get 2.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 4

Going ahead to step 8:
4 goes into 25 6 times with a remainder of 1.
Record the quotient 6 as the next digit in the result. 
Result so far: 21775196.0
The remainder is 1 after subtracting 24 from 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 9:
10 divided by 4 is 2 with a remainder of 2.
The next digit of our result is 2. 
Result so far: 21775196.2
If we subtract 8 from 10, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 10:
When dividing 20 by 4, we get 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 21775196.25
Subtract 20 from 20 to 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.

Moving on to step 11:
0 divided by 4 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 21775196.25
Subtracting 0 from 0 leaves us 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.

Moving on to step 12:
0 divided by 4 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 21775196.25
Subtracting 0 from 0 leaves us 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.

The final outcome is 21775196.25, with a leftover of 0.0.