639153 divided by 45 
We want to figure out the number of times 639153 can be divided by 45.

Going ahead to step 1:
If we divide 6 by 45, we get 0 and a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 45

Let's proceed to step 2:
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: 1.0
If we take 45 away from 63, we end up with 18.
Append the next digit (9) from the dividend to 18 and continue with: 189 / 45

Advancing to step 3:
45 goes into 189 4 times with a remainder of 9.
Write down 4 as next digit of the result. 
Result so far: 14.0
If we take 180 away from 189, we end up with 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 45

Moving on to step 4:
91 divided by 45 is 2 with a remainder of 1.
The next digit of our result is 2. 
Result so far: 142.0
Subtract 90 from 91 to get 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 45

On to step 5:
The number 45 fits into 15 0 times, leaving a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 1420.0
If we subtract 0 from 15, we get 15.
Bring next digit (3) of the dividend behind the 15 and repeat the process: 153 / 45

Advancing to step 6:
If we divide 153 by 45, we get 3 and a remainder of 18.
Use 3 as the next digit of our solution. 
Result so far: 14203.0
If we take 135 away from 153, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 7:
45 goes into 180 4 times with a remainder of 0.
The next digit of our result is 4. 
Result so far: 14203.4
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.

Moving on to step 8:
45 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 14203.4
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.

Let's proceed to step 9:
The number 45 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 14203.4
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.

Our division results in 14203.4 with a remaining 0.0.