We divide 851858 by 86
Let's see how many times 86 fits into 851858.

Going ahead to step 1:
8 divided by 86 is 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Include the next digit (5) from the dividend after 8, then repeat: 85 / 86

Moving on to step 2:
When dividing 85 by 86, we get 0 with a remainder of 85.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 85 and we're left with 85.
Append the next digit (1) from the dividend to 85 and continue with: 851 / 86

Moving on to step 3:
851 divided by 86 is 9 with a remainder of 77.
The next digit of our result is 9. 
Result so far: 9.0
If we subtract 774 from 851, we get 77.
Append the next digit (8) from the dividend to 77 and continue with: 778 / 86

Going ahead to step 4:
The number 86 fits into 778 9 times, leaving a remainder of 4.
The number 9 becomes the next digit in our result. 
Result so far: 99.0
The remainder is 4 after subtracting 774 from 778.
Grab the next digit (5) from the dividend, add it to 4, then carry on: 45 / 86

Let's proceed to step 5:
When dividing 45 by 86, we get 0 with a remainder of 45.
Put 0 as the next digit of the answer. 
Result so far: 990.0
If we subtract 0 from 45, we get 45.
Append the next digit (8) from the dividend to 45 and continue with: 458 / 86

Advancing to step 6:
The number 86 fits into 458 5 times, leaving a remainder of 28.
Put 5 as the next digit of the answer. 
Result so far: 9905.0
Subtracting 430 from 458 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 7:
86 goes into 280 3 times with a remainder of 22.
Write down 3 as next digit of the result. 
Result so far: 9905.3
If we subtract 258 from 280, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 8:
220 divided by 86 is 2 with a remainder of 48.
The next digit of our result is 2. 
Result so far: 9905.32
Deduct 172 from 220 and we're left 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 9:
When dividing 480 by 86, we get 5 with a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 9905.325
Deduct 430 from 480 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 10:
If we divide 500 by 86, we get 5 and a remainder of 70.
The next digit of our result is 5. 
Result so far: 9905.3255
If we subtract 430 from 500, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

The quotient of the division is 9905.3255, and the remainder is 0.0007.