57869985 ÷ 851 
Let's see how many times 851 fits into 57869985.

Going ahead to step 1:
851 can be fit into 5 0 times, resulting in a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Grab the next digit (7) from the dividend, add it to 5, then carry on: 57 / 851

Going ahead to step 2:
The number 851 fits into 57 0 times, leaving a remainder of 57.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 57, we end up with 57.
Grab the next digit (8) from the dividend, add it to 57, then carry on: 578 / 851

Let's proceed to step 3:
The number 851 fits into 578 0 times, leaving a remainder of 578.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 578 leaves us with 578.
Grab the next digit (6) from the dividend, add it to 578, then carry on: 5786 / 851

Moving on to step 4:
If we divide 5786 by 851, we get 6 and a remainder of 680.
The next digit of our result is 6. 
Result so far: 6.0
If we subtract 5106 from 5786, we get 680.
Append the next digit (9) from the dividend to 680 and continue with: 6809 / 851

On to step 5:
851 goes into 6809 8 times with a remainder of 1.
Write down 8 as next digit of the result. 
Result so far: 68.0
Subtract 6808 from 6809 to get 1.
Grab the next digit (9) from the dividend, add it to 1, then carry on: 19 / 851

Moving on to step 6:
19 divided by 851 is 0 with a remainder of 19.
Write down 0 as next digit of the result. 
Result so far: 680.0
Subtract 0 from 19 to get 19.
Bring next digit (8) of the dividend behind the 19 and repeat the process: 198 / 851

Let's proceed to step 7:
198 divided by 851 is 0 with a remainder of 198.
The next digit of our result is 0. 
Result so far: 6800.0
Subtract 0 from 198 to get 198.
Bring next digit (5) of the dividend behind the 198 and repeat the process: 1985 / 851

Step 8:
1985 divided by 851 is 2 with a remainder of 283.
Write down 2 as next digit of the result. 
Result so far: 68002.0
Deduct 1702 from 1985 and we're left with 283.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2830, and continue the process.

On to step 9:
When dividing 2830 by 851, we get 3 with a remainder of 277.
Record the quotient 3 as the next digit in the result. 
Result so far: 68002.3
Deduct 2553 from 2830 and we're left with 277.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2770, and continue the process.

Step 10:
When dividing 2770 by 851, we get 3 with a remainder of 217.
Record the quotient 3 as the next digit in the result. 
Result so far: 68002.33
Subtracting 2553 from 2770 leaves us with 217.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2170, and continue the process.

The final result is 68002.33 with a remainder of 0.217.