We look at the division of 390851 by 3 
Our goal is to divide 390851 by 3.

Going ahead to step 1:
3 can be fit into 3 1 times, resulting in a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 3 away from 3, we end up with 0.
Fetch the next digit (9) from the dividend, attach it to 0 and continue: 9 / 3

Advancing to step 2:
When dividing 9 by 3, we get 3 with a remainder of 0.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
Subtract 9 from 9 to get 0.
Fetch the next digit (0) from the dividend, attach it to 0 and continue: 0 / 3

Advancing to step 3:
3 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 130.0
The remainder is 0 after subtracting 0 from 0.
Grab the next digit (8) from the dividend, add it to 0, then carry on: 8 / 3

On to step 4:
3 can be fit into 8 2 times, resulting in a remainder of 2.
Put 2 as the next digit of the answer. 
Result so far: 1302.0
If we take 6 away from 8, we end up with 2.
Append the next digit (5) from the dividend to 2 and continue with: 25 / 3

Going ahead to step 5:
If we divide 25 by 3, we get 8 and a remainder of 1.
The number 8 becomes the next digit in our result. 
Result so far: 13028.0
Subtract 24 from 25 to get 1.
Append the next digit (1) from the dividend to 1 and continue with: 11 / 3

Step 6:
3 goes into 11 3 times with a remainder of 2.
The number 3 becomes the next digit in our result. 
Result so far: 130283.0
The remainder is 2 after subtracting 9 from 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 7:
If we divide 20 by 3, we get 6 and a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 130283.6
Subtracting 18 from 20 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 8:
When dividing 20 by 3, we get 6 with a remainder of 2.
Use 6 as the next digit of our solution. 
Result so far: 130283.66
Subtracting 18 from 20 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The quotient of the division is 130283.66, and the remainder is 0.002.