We look at the division of 86556399 by 45 
We want to figure out the number of times 86556399 can be divided by 45.

Moving on to step 1:
If we divide 8 by 45, we get 0 and a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 45

On to step 2:
If we divide 86 by 45, we get 1 and a remainder of 41.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 45 from 86 to get 41.
Bring next digit (5) of the dividend behind the 41 and repeat the process: 415 / 45

Moving on to step 3:
If we divide 415 by 45, we get 9 and a remainder of 10.
Put 9 as the next digit of the answer. 
Result so far: 19.0
Subtracting 405 from 415 leaves us with 10.
Fetch the next digit (5) from the dividend, attach it to 10 and continue: 105 / 45

Advancing to step 4:
If we divide 105 by 45, we get 2 and a remainder of 15.
Put 2 as the next digit of the answer. 
Result so far: 192.0
Subtracting 90 from 105 leaves us with 15.
Fetch the next digit (6) from the dividend, attach it to 15 and continue: 156 / 45

Going ahead to step 5:
45 goes into 156 3 times with a remainder of 21.
The number 3 becomes the next digit in our result. 
Result so far: 1923.0
Subtract 135 from 156 to get 21.
Append the next digit (3) from the dividend to 21 and continue with: 213 / 45

Moving on to step 6:
45 can be fit into 213 4 times, resulting in a remainder of 33.
Put 4 as the next digit of the answer. 
Result so far: 19234.0
Subtracting 180 from 213 leaves us with 33.
Append the next digit (9) from the dividend to 33 and continue with: 339 / 45

Moving on to step 7:
The number 45 fits into 339 7 times, leaving a remainder of 24.
The number 7 becomes the next digit in our result. 
Result so far: 192347.0
The remainder is 24 after subtracting 315 from 339.
Fetch the next digit (9) from the dividend, attach it to 24 and continue: 249 / 45

On to step 8:
249 divided by 45 is 5 with a remainder of 24.
Record the quotient 5 as the next digit in the result. 
Result so far: 1923475.0
The remainder is 24 after subtracting 225 from 249.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 9:
When dividing 240 by 45, we get 5 with a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 1923475.5
If we take 225 away from 240, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 10:
When dividing 150 by 45, we get 3 with a remainder of 15.
Put 3 as the next digit of the answer. 
Result so far: 1923475.53
The remainder is 15 after subtracting 135 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 11:
The number 45 fits into 150 3 times, leaving a remainder of 15.
The number 3 becomes the next digit in our result. 
Result so far: 1923475.533
Subtracting 135 from 150 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Our division results in 1923475.533 with a remaining 0.0015.