Let's divide 851800 by 18
We want to divide 851800 by 18.

Moving on to step 1:
18 can be fit into 8 0 times, resulting in a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Append the next digit (5) from the dividend to 8 and continue with: 85 / 18

Moving on to step 2:
18 goes into 85 4 times with a remainder of 13.
Use 4 as the next digit of our solution. 
Result so far: 4.0
If we subtract 72 from 85, we get 13.
Include the next digit (1) from the dividend after 13, then repeat: 131 / 18

Going ahead to step 3:
If we divide 131 by 18, we get 7 and a remainder of 5.
Put 7 as the next digit of the answer. 
Result so far: 47.0
Deduct 126 from 131 and we're left with 5.
Grab the next digit (8) from the dividend, add it to 5, then carry on: 58 / 18

On to step 4:
58 divided by 18 is 3 with a remainder of 4.
Write down 3 as next digit of the result. 
Result so far: 473.0
Subtract 54 from 58 to get 4.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 18

Moving on to step 5:
When dividing 40 by 18, we get 2 with a remainder of 4.
Record the quotient 2 as the next digit in the result. 
Result so far: 4732.0
The remainder is 4 after subtracting 36 from 40.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 18

Going ahead to step 6:
40 divided by 18 is 2 with a remainder of 4.
The next digit of our result is 2. 
Result so far: 47322.0
Deduct 36 from 40 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 7:
When dividing 40 by 18, we get 2 with a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 47322.2
If we take 36 away from 40, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 8:
The number 18 fits into 40 2 times, leaving a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 47322.22
If we subtract 36 from 40, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final outcome is 47322.22, with a leftover of 0.004.