We look at the division of 390818 by 1 
Let's see how many times 1 fits into 390818.

Going ahead to step 1:
1 goes into 3 3 times with a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Subtracting 3 from 3 leaves us with 0.
Take the next digit (9) from the dividend and append it to 0, then repeat: 9 / 1

Going ahead to step 2:
When dividing 9 by 1, we get 9 with a remainder of 0.
Record the quotient 9 as the next digit in the result. 
Result so far: 39.0
If we take 9 away from 9, we end up with 0.
Append the next digit (0) from the dividend to 0 and continue with: 0 / 1

Going ahead to step 3:
1 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 390.0
If we subtract 0 from 0, we get 0.
Include the next digit (8) from the dividend after 0, then repeat: 8 / 1

Advancing to step 4:
8 divided by 1 is 8 with a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 3908.0
Subtract 8 from 8 to get 0.
Take the next digit (1) from the dividend and append it to 0, then repeat: 1 / 1

Going ahead to step 5:
When dividing 1 by 1, we get 1 with a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 39081.0
Subtracting 1 from 1 leaves us with 0.
Append the next digit (8) from the dividend to 0 and continue with: 8 / 1

Step 6:
8 divided by 1 is 8 with a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 390818.0
If we take 8 away from 8, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 7:
1 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 390818.0
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
The number 1 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 390818.0
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 390818.0, with a leftover of 0.0.