We look at the division of 561615 by 51 
We're looking to find how many times 51 goes into 561615.

Moving on to step 1:
51 goes into 5 0 times with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Append the next digit (6) from the dividend to 5 and continue with: 56 / 51

Let's proceed to step 2:
56 divided by 51 is 1 with a remainder of 5.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 5 after subtracting 51 from 56.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 51

Let's proceed to step 3:
51 divided by 51 is 1 with a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 11.0
Deduct 51 from 51 and we're left with 0.
Take the next digit (6) from the dividend and append it to 0, then repeat: 6 / 51

Moving on to step 4:
51 can be fit into 6 0 times, resulting in a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 110.0
Deduct 0 from 6 and we're left with 6.
Grab the next digit (1) from the dividend, add it to 6, then carry on: 61 / 51

Step 5:
The number 51 fits into 61 1 times, leaving a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 1101.0
Deduct 51 from 61 and we're left with 10.
Include the next digit (5) from the dividend after 10, then repeat: 105 / 51

Let's proceed to step 6:
51 can be fit into 105 2 times, resulting in a remainder of 3.
Put 2 as the next digit of the answer. 
Result so far: 11012.0
If we take 102 away from 105, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 7:
The number 51 fits into 30 0 times, leaving a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 11012.0
If we subtract 0 from 30, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 8:
If we divide 300 by 51, we get 5 and a remainder of 45.
Write down 5 as next digit of the result. 
Result so far: 11012.05
Deduct 255 from 300 and we're left with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Going ahead to step 9:
450 divided by 51 is 8 with a remainder of 42.
The number 8 becomes the next digit in our result. 
Result so far: 11012.058
The remainder is 42 after subtracting 408 from 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Let's proceed to step 10:
The number 51 fits into 420 8 times, leaving a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 11012.0588
Deduct 408 from 420 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final outcome is 11012.0588, with a leftover of 0.00012.