815580 divided by 4 
We want to figure out the number of times 815580 can be divided by 4.

Let's proceed to step 1:
4 can be fit into 8 2 times, resulting in a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 8 away from 8, we end up with 0.
Bring next digit (1) of the dividend behind the 0 and repeat the process: 1 / 4

Going ahead to step 2:
When dividing 1 by 4, we get 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 20.0
If we subtract 0 from 1, we get 1.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 4

Advancing to step 3:
If we divide 15 by 4, we get 3 and a remainder of 3.
Use 3 as the next digit of our solution. 
Result so far: 203.0
The remainder is 3 after subtracting 12 from 15.
Take the next digit (5) from the dividend and append it to 3, then repeat: 35 / 4

Going ahead to step 4:
When dividing 35 by 4, we get 8 with a remainder of 3.
The next digit of our result is 8. 
Result so far: 2038.0
Subtracting 32 from 35 leaves us with 3.
Grab the next digit (8) from the dividend, add it to 3, then carry on: 38 / 4

Step 5:
4 can be fit into 38 9 times, resulting in a remainder of 2.
Record the quotient 9 as the next digit in the result. 
Result so far: 20389.0
Deduct 36 from 38 and we're left with 2.
Bring next digit (0) of the dividend behind the 2 and repeat the process: 20 / 4

Step 6:
4 goes into 20 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 203895.0
The remainder is 0 after subtracting 20 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 7:
When dividing 0 by 4, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 203895.0
The remainder is 0 after subtracting 0 from 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 8:
4 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 203895.0
Subtract 0 from 0 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.

The final result is 203895.0 with a remainder of 0.0.