We're dividing 851259 by 71 
We're looking to find how many times 71 goes into 851259.

On to step 1:
71 can be fit into 8 0 times, resulting in a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (5) from the dividend after 8, then repeat: 85 / 71

Step 2:
When dividing 85 by 71, we get 1 with a remainder of 14.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 71 from 85 and we're left with 14.
Bring next digit (1) of the dividend behind the 14 and repeat the process: 141 / 71

Advancing to step 3:
71 can be fit into 141 1 times, resulting in a remainder of 70.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
Subtract 71 from 141 to get 70.
Append the next digit (2) from the dividend to 70 and continue with: 702 / 71

Let's proceed to step 4:
71 can be fit into 702 9 times, resulting in a remainder of 63.
Write down 9 as next digit of the result. 
Result so far: 119.0
Subtract 639 from 702 to get 63.
Append the next digit (5) from the dividend to 63 and continue with: 635 / 71

Advancing to step 5:
The number 71 fits into 635 8 times, leaving a remainder of 67.
Put 8 as the next digit of the answer. 
Result so far: 1198.0
Subtract 568 from 635 to get 67.
Fetch the next digit (9) from the dividend, attach it to 67 and continue: 679 / 71

Step 6:
71 goes into 679 9 times with a remainder of 40.
Record the quotient 9 as the next digit in the result. 
Result so far: 11989.0
If we take 639 away from 679, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 7:
71 goes into 400 5 times with a remainder of 45.
Record the quotient 5 as the next digit in the result. 
Result so far: 11989.5
Subtracting 355 from 400 leaves us 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.

Step 8:
If we divide 450 by 71, we get 6 and a remainder of 24.
Use 6 as the next digit of our solution. 
Result so far: 11989.56
If we take 426 away from 450, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 9:
When dividing 240 by 71, we get 3 with a remainder of 27.
The number 3 becomes the next digit in our result. 
Result so far: 11989.563
The remainder is 27 after subtracting 213 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Advancing to step 10:
If we divide 270 by 71, we get 3 and a remainder of 57.
The number 3 becomes the next digit in our result. 
Result so far: 11989.5633
If we subtract 213 from 270, we get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

The final outcome is 11989.5633, with a leftover of 0.00057.