We're dividing 91515904 by 4 
We want to figure out the number of times 91515904 can be divided by 4.

On to step 1:
If we divide 9 by 4, we get 2 and a remainder of 1.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtract 8 from 9 to get 1.
Take the next digit (1) from the dividend and append it to 1, then repeat: 11 / 4

Let's proceed to step 2:
If we divide 11 by 4, we get 2 and a remainder of 3.
The number 2 becomes the next digit in our result. 
Result so far: 22.0
Subtracting 8 from 11 leaves us with 3.
Append the next digit (5) from the dividend to 3 and continue with: 35 / 4

Let's proceed to step 3:
4 goes into 35 8 times with a remainder of 3.
Use 8 as the next digit of our solution. 
Result so far: 228.0
Subtract 32 from 35 to get 3.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 4

Going ahead to step 4:
4 goes into 31 7 times with a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 2287.0
If we subtract 28 from 31, we get 3.
Bring next digit (5) of the dividend behind the 3 and repeat the process: 35 / 4

Let's proceed to step 5:
When dividing 35 by 4, we get 8 with a remainder of 3.
Use 8 as the next digit of our solution. 
Result so far: 22878.0
If we subtract 32 from 35, we get 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 4

Let's proceed to step 6:
The number 4 fits into 39 9 times, leaving a remainder of 3.
Use 9 as the next digit of our solution. 
Result so far: 228789.0
Deduct 36 from 39 and we're left with 3.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 4

Advancing to step 7:
If we divide 30 by 4, we get 7 and a remainder of 2.
Use 7 as the next digit of our solution. 
Result so far: 2287897.0
If we subtract 28 from 30, we get 2.
Grab the next digit (4) from the dividend, add it to 2, then carry on: 24 / 4

Advancing to step 8:
24 divided by 4 is 6 with a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 22878976.0
The remainder is 0 after subtracting 24 from 24.
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 9:
When dividing 0 by 4, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 22878976.0
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 10:
0 divided by 4 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 22878976.0
If we take 0 away from 0, we end up 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 quotient of the division is 22878976.0, and the remainder is 0.0.