555996 ÷ 15 
We're looking to find how many times 15 goes into 555996.

Step 1:
15 can be fit into 5 0 times, resulting in a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Fetch the next digit (5) from the dividend, attach it to 5 and continue: 55 / 15

Advancing to step 2:
15 goes into 55 3 times with a remainder of 10.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Deduct 45 from 55 and we're left with 10.
Grab the next digit (5) from the dividend, add it to 10, then carry on: 105 / 15

Let's proceed to step 3:
The number 15 fits into 105 7 times, leaving a remainder of 0.
The next digit of our result is 7. 
Result so far: 37.0
Deduct 105 from 105 and we're left with 0.
Include the next digit (9) from the dividend after 0, then repeat: 9 / 15

Step 4:
15 can be fit into 9 0 times, resulting in a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 370.0
Deduct 0 from 9 and we're left with 9.
Append the next digit (9) from the dividend to 9 and continue with: 99 / 15

On to step 5:
15 can be fit into 99 6 times, resulting in a remainder of 9.
Put 6 as the next digit of the answer. 
Result so far: 3706.0
Subtracting 90 from 99 leaves us with 9.
Fetch the next digit (6) from the dividend, attach it to 9 and continue: 96 / 15

Advancing to step 6:
96 divided by 15 is 6 with a remainder of 6.
Record the quotient 6 as the next digit in the result. 
Result so far: 37066.0
If we take 90 away from 96, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 7:
The number 15 fits into 60 4 times, leaving a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 37066.4
The remainder is 0 after subtracting 60 from 60.
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 8:
If we divide 0 by 15, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 37066.4
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.

Let's proceed to step 9:
15 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 37066.4
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 37066.4, with a leftover of 0.0.