We look at the division of 861141 by 51 
We're looking to find how many times 51 goes into 861141.

Moving on to step 1:
8 divided by 51 is 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 51

On to step 2:
If we divide 86 by 51, we get 1 and a remainder of 35.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 51 from 86 leaves us with 35.
Include the next digit (1) from the dividend after 35, then repeat: 351 / 51

Let's proceed to step 3:
When dividing 351 by 51, we get 6 with a remainder of 45.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
If we subtract 306 from 351, we get 45.
Fetch the next digit (1) from the dividend, attach it to 45 and continue: 451 / 51

On to step 4:
51 can be fit into 451 8 times, resulting in a remainder of 43.
Write down 8 as next digit of the result. 
Result so far: 168.0
If we subtract 408 from 451, we get 43.
Grab the next digit (4) from the dividend, add it to 43, then carry on: 434 / 51

On to step 5:
When dividing 434 by 51, we get 8 with a remainder of 26.
Use 8 as the next digit of our solution. 
Result so far: 1688.0
If we take 408 away from 434, we end up with 26.
Grab the next digit (1) from the dividend, add it to 26, then carry on: 261 / 51

Moving on to step 6:
261 divided by 51 is 5 with a remainder of 6.
The next digit of our result is 5. 
Result so far: 16885.0
If we subtract 255 from 261, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 7:
51 can be fit into 60 1 times, resulting in a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 16885.1
If we subtract 51 from 60, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 8:
51 can be fit into 90 1 times, resulting in a remainder of 39.
The number 1 becomes the next digit in our result. 
Result so far: 16885.11
If we subtract 51 from 90, we get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

The final result is 16885.11 with a remainder of 0.039.