639630 divided by 45 
We want to divide 639630 by 45.

Advancing to step 1:
When dividing 6 by 45, we get 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Append the next digit (3) from the dividend to 6 and continue with: 63 / 45

Advancing to step 2:
If we divide 63 by 45, we get 1 and a remainder of 18.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 45 from 63, we get 18.
Bring next digit (9) of the dividend behind the 18 and repeat the process: 189 / 45

Advancing to step 3:
When dividing 189 by 45, we get 4 with a remainder of 9.
The number 4 becomes the next digit in our result. 
Result so far: 14.0
Subtract 180 from 189 to get 9.
Grab the next digit (6) from the dividend, add it to 9, then carry on: 96 / 45

On to step 4:
45 goes into 96 2 times with a remainder of 6.
The next digit of our result is 2. 
Result so far: 142.0
Subtract 90 from 96 to get 6.
Fetch the next digit (3) from the dividend, attach it to 6 and continue: 63 / 45

Going ahead to step 5:
45 can be fit into 63 1 times, resulting in a remainder of 18.
The next digit of our result is 1. 
Result so far: 1421.0
Subtracting 45 from 63 leaves us with 18.
Fetch the next digit (0) from the dividend, attach it to 18 and continue: 180 / 45

Let's proceed to step 6:
45 can be fit into 180 4 times, resulting in a remainder of 0.
The next digit of our result is 4. 
Result so far: 14214.0
Deduct 180 from 180 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.

On to step 7:
The number 45 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 14214.0
If we take 0 away from 0, 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 8:
When dividing 0 by 45, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 14214.0
Subtract 0 from 0 to 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.

The final outcome is 14214.0, with a leftover of 0.0.