39174343 divided by 639 
Our goal is to divide 39174343 by 639.

Advancing to step 1:
When dividing 3 by 639, we get 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 639

Moving on to step 2:
639 can be fit into 39 0 times, resulting in a remainder of 39.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 39 to get 39.
Fetch the next digit (1) from the dividend, attach it to 39 and continue: 391 / 639

Step 3:
The number 639 fits into 391 0 times, leaving a remainder of 391.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 391 leaves us with 391.
Take the next digit (7) from the dividend and append it to 391, then repeat: 3917 / 639

Going ahead to step 4:
3917 divided by 639 is 6 with a remainder of 83.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
Subtracting 3834 from 3917 leaves us with 83.
Include the next digit (4) from the dividend after 83, then repeat: 834 / 639

On to step 5:
If we divide 834 by 639, we get 1 and a remainder of 195.
Put 1 as the next digit of the answer. 
Result so far: 61.0
If we take 639 away from 834, we end up with 195.
Grab the next digit (3) from the dividend, add it to 195, then carry on: 1953 / 639

Advancing to step 6:
639 goes into 1953 3 times with a remainder of 36.
Write down 3 as next digit of the result. 
Result so far: 613.0
If we subtract 1917 from 1953, we get 36.
Fetch the next digit (4) from the dividend, attach it to 36 and continue: 364 / 639

Step 7:
639 goes into 364 0 times with a remainder of 364.
Put 0 as the next digit of the answer. 
Result so far: 6130.0
Deduct 0 from 364 and we're left with 364.
Bring next digit (3) of the dividend behind the 364 and repeat the process: 3643 / 639

On to step 8:
639 can be fit into 3643 5 times, resulting in a remainder of 448.
Use 5 as the next digit of our solution. 
Result so far: 61305.0
Deduct 3195 from 3643 and we're left with 448.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4480, and continue the process.

Going ahead to step 9:
When dividing 4480 by 639, we get 7 with a remainder of 7.
The number 7 becomes the next digit in our result. 
Result so far: 61305.7
If we take 4473 away from 4480, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 10:
When dividing 70 by 639, we get 0 with a remainder of 70.
The number 0 becomes the next digit in our result. 
Result so far: 61305.7
Deduct 0 from 70 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 11:
When dividing 700 by 639, we get 1 with a remainder of 61.
Record the quotient 1 as the next digit in the result. 
Result so far: 61305.701
Subtract 639 from 700 to get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Step 12:
If we divide 610 by 639, we get 0 and a remainder of 610.
Put 0 as the next digit of the answer. 
Result so far: 61305.701
The remainder is 610 after subtracting 0 from 610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6100, and continue the process.

Advancing to step 13:
639 goes into 6100 9 times with a remainder of 349.
The next digit of our result is 9. 
Result so far: 61305.70109
If we subtract 5751 from 6100, we get 349.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3490, and continue the process.

Step 14:
639 can be fit into 3490 5 times, resulting in a remainder of 295.
Write down 5 as next digit of the result. 
Result so far: 61305.701095
Deduct 3195 from 3490 and we're left with 295.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2950, and continue the process.

Let's proceed to step 15:
639 goes into 2950 4 times with a remainder of 394.
Record the quotient 4 as the next digit in the result. 
Result so far: 61305.7010954
If we take 2556 away from 2950, we end up with 394.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3940, and continue the process.

Step 16:
The number 639 fits into 3940 6 times, leaving a remainder of 106.
The next digit of our result is 6. 
Result so far: 61305.70109546
Subtract 3834 from 3940 to get 106.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1060, and continue the process.

The final outcome is 61305.70109546, with a leftover of 1.06e-07.