We divide 389621 by 1
We're looking to find how many times 1 goes into 389621.

Moving on to step 1:
If we divide 3 by 1, we get 3 and a remainder of 0.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we take 3 away from 3, we end up with 0.
Fetch the next digit (8) from the dividend, attach it to 0 and continue: 8 / 1

Step 2:
1 goes into 8 8 times with a remainder of 0.
The next digit of our result is 8. 
Result so far: 38.0
The remainder is 0 after subtracting 8 from 8.
Include the next digit (9) from the dividend after 0, then repeat: 9 / 1

Step 3:
1 can be fit into 9 9 times, resulting in a remainder of 0.
Use 9 as the next digit of our solution. 
Result so far: 389.0
Deduct 9 from 9 and we're left with 0.
Append the next digit (6) from the dividend to 0 and continue with: 6 / 1

On to step 4:
If we divide 6 by 1, we get 6 and a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 3896.0
If we take 6 away from 6, we end up with 0.
Take the next digit (2) from the dividend and append it to 0, then repeat: 2 / 1

Step 5:
The number 1 fits into 2 2 times, leaving a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 38962.0
Deduct 2 from 2 and we're left with 0.
Append the next digit (1) from the dividend to 0 and continue with: 1 / 1

Advancing to step 6:
When dividing 1 by 1, we get 1 with a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 389621.0
Deduct 1 from 1 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.

Let's proceed to step 7:
1 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 389621.0
Subtracting 0 from 0 leaves us 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 8:
0 divided by 1 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 389621.0
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.

Our division results in 389621.0 with a remaining 0.0.