We're dividing 85983 by 51 
We want to figure out the number of times 85983 can be divided by 51.

Moving on to step 1:
51 goes into 8 0 times with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Fetch the next digit (5) from the dividend, attach it to 8 and continue: 85 / 51

Let's proceed to step 2:
85 divided by 51 is 1 with a remainder of 34.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 51 from 85 to get 34.
Fetch the next digit (9) from the dividend, attach it to 34 and continue: 349 / 51

Step 3:
The number 51 fits into 349 6 times, leaving a remainder of 43.
The number 6 becomes the next digit in our result. 
Result so far: 16.0
Deduct 306 from 349 and we're left with 43.
Bring next digit (8) of the dividend behind the 43 and repeat the process: 438 / 51

Step 4:
If we divide 438 by 51, we get 8 and a remainder of 30.
The number 8 becomes the next digit in our result. 
Result so far: 168.0
If we subtract 408 from 438, we get 30.
Fetch the next digit (3) from the dividend, attach it to 30 and continue: 303 / 51

Let's proceed to step 5:
When dividing 303 by 51, we get 5 with a remainder of 48.
Use 5 as the next digit of our solution. 
Result so far: 1685.0
If we take 255 away from 303, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 6:
If we divide 480 by 51, we get 9 and a remainder of 21.
Put 9 as the next digit of the answer. 
Result so far: 1685.9
Subtracting 459 from 480 leaves us with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

On to step 7:
51 goes into 210 4 times with a remainder of 6.
The next digit of our result is 4. 
Result so far: 1685.94
Subtracting 204 from 210 leaves us 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.

On to step 8:
51 can be fit into 60 1 times, resulting in a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 1685.941
The remainder is 9 after subtracting 51 from 60.
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 9:
51 can be fit into 90 1 times, resulting in a remainder of 39.
Record the quotient 1 as the next digit in the result. 
Result so far: 1685.9411
Subtract 51 from 90 to 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 1685.9411 with a remainder of 0.00039.