We divide 378831 by 18
We're looking to find how many times 18 goes into 378831.

Going ahead to step 1:
18 goes into 3 0 times with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Include the next digit (7) from the dividend after 3, then repeat: 37 / 18

Let's proceed to step 2:
18 can be fit into 37 2 times, resulting in a remainder of 1.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtract 36 from 37 to get 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 18

On to step 3:
18 can be fit into 18 1 times, resulting in a remainder of 0.
The next digit of our result is 1. 
Result so far: 21.0
Deduct 18 from 18 and we're left with 0.
Append the next digit (8) from the dividend to 0 and continue with: 8 / 18

On to step 4:
18 can be fit into 8 0 times, resulting in a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 210.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (3) from the dividend to 8 and continue with: 83 / 18

On to step 5:
18 can be fit into 83 4 times, resulting in a remainder of 11.
Put 4 as the next digit of the answer. 
Result so far: 2104.0
Subtracting 72 from 83 leaves us with 11.
Fetch the next digit (1) from the dividend, attach it to 11 and continue: 111 / 18

Let's proceed to step 6:
111 divided by 18 is 6 with a remainder of 3.
Put 6 as the next digit of the answer. 
Result so far: 21046.0
The remainder is 3 after subtracting 108 from 111.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 7:
18 goes into 30 1 times with a remainder of 12.
Record the quotient 1 as the next digit in the result. 
Result so far: 21046.1
If we take 18 away from 30, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 8:
18 goes into 120 6 times with a remainder of 12.
The number 6 becomes the next digit in our result. 
Result so far: 21046.16
The remainder is 12 after subtracting 108 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 9:
18 can be fit into 120 6 times, resulting in a remainder of 12.
The number 6 becomes the next digit in our result. 
Result so far: 21046.166
Subtracting 108 from 120 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Our division results in 21046.166 with a remaining 0.0012.