We look at the division of 39390113 by 621 
Our goal is to divide 39390113 by 621.

Moving on to step 1:
If we divide 3 by 621, we get 0 and a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 621

Step 2:
When dividing 39 by 621, we get 0 with a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 39 after subtracting 0 from 39.
Append the next digit (3) from the dividend to 39 and continue with: 393 / 621

Going ahead to step 3:
621 can be fit into 393 0 times, resulting in a remainder of 393.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 393 leaves us with 393.
Include the next digit (9) from the dividend after 393, then repeat: 3939 / 621

Going ahead to step 4:
3939 divided by 621 is 6 with a remainder of 213.
Write down 6 as next digit of the result. 
Result so far: 6.0
Subtract 3726 from 3939 to get 213.
Grab the next digit (0) from the dividend, add it to 213, then carry on: 2130 / 621

Going ahead to step 5:
621 can be fit into 2130 3 times, resulting in a remainder of 267.
Write down 3 as next digit of the result. 
Result so far: 63.0
Subtract 1863 from 2130 to get 267.
Include the next digit (1) from the dividend after 267, then repeat: 2671 / 621

Going ahead to step 6:
2671 divided by 621 is 4 with a remainder of 187.
Write down 4 as next digit of the result. 
Result so far: 634.0
Subtracting 2484 from 2671 leaves us with 187.
Fetch the next digit (1) from the dividend, attach it to 187 and continue: 1871 / 621

Going ahead to step 7:
621 goes into 1871 3 times with a remainder of 8.
Use 3 as the next digit of our solution. 
Result so far: 6343.0
If we take 1863 away from 1871, we end up with 8.
Fetch the next digit (3) from the dividend, attach it to 8 and continue: 83 / 621

Advancing to step 8:
83 divided by 621 is 0 with a remainder of 83.
Record the quotient 0 as the next digit in the result. 
Result so far: 63430.0
Deduct 0 from 83 and we're left with 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

Moving on to step 9:
When dividing 830 by 621, we get 1 with a remainder of 209.
Use 1 as the next digit of our solution. 
Result so far: 63430.1
If we take 621 away from 830, we end up with 209.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2090, and continue the process.

Advancing to step 10:
621 goes into 2090 3 times with a remainder of 227.
Put 3 as the next digit of the answer. 
Result so far: 63430.13
Subtract 1863 from 2090 to get 227.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2270, and continue the process.

Let's proceed to step 11:
The number 621 fits into 2270 3 times, leaving a remainder of 407.
Record the quotient 3 as the next digit in the result. 
Result so far: 63430.133
Deduct 1863 from 2270 and we're left with 407.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4070, and continue the process.

The final result is 63430.133 with a remainder of 0.0407.