Let's divide 13910940 by 639
Our goal is to divide 13910940 by 639.

Moving on to step 1:
If we divide 1 by 639, we get 0 and a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 639

Let's proceed to step 2:
When dividing 13 by 639, we get 0 with a remainder of 13.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 13 after subtracting 0 from 13.
Append the next digit (9) from the dividend to 13 and continue with: 139 / 639

Moving on to step 3:
639 can be fit into 139 0 times, resulting in a remainder of 139.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 139, we end up with 139.
Bring next digit (1) of the dividend behind the 139 and repeat the process: 1391 / 639

Moving on to step 4:
If we divide 1391 by 639, we get 2 and a remainder of 113.
The next digit of our result is 2. 
Result so far: 2.0
Subtracting 1278 from 1391 leaves us with 113.
Bring next digit (0) of the dividend behind the 113 and repeat the process: 1130 / 639

Let's proceed to step 5:
1130 divided by 639 is 1 with a remainder of 491.
Put 1 as the next digit of the answer. 
Result so far: 21.0
If we take 639 away from 1130, we end up with 491.
Fetch the next digit (9) from the dividend, attach it to 491 and continue: 4919 / 639

On to step 6:
If we divide 4919 by 639, we get 7 and a remainder of 446.
Write down 7 as next digit of the result. 
Result so far: 217.0
Deduct 4473 from 4919 and we're left with 446.
Bring next digit (4) of the dividend behind the 446 and repeat the process: 4464 / 639

On to step 7:
The number 639 fits into 4464 6 times, leaving a remainder of 630.
The number 6 becomes the next digit in our result. 
Result so far: 2176.0
Subtract 3834 from 4464 to get 630.
Bring next digit (0) of the dividend behind the 630 and repeat the process: 6300 / 639

Going ahead to step 8:
When dividing 6300 by 639, we get 9 with a remainder of 549.
The next digit of our result is 9. 
Result so far: 21769.0
The remainder is 549 after subtracting 5751 from 6300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5490, and continue the process.

Let's proceed to step 9:
When dividing 5490 by 639, we get 8 with a remainder of 378.
Record the quotient 8 as the next digit in the result. 
Result so far: 21769.8
The remainder is 378 after subtracting 5112 from 5490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3780, and continue the process.

Advancing to step 10:
If we divide 3780 by 639, we get 5 and a remainder of 585.
Put 5 as the next digit of the answer. 
Result so far: 21769.85
If we subtract 3195 from 3780, we get 585.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5850, and continue the process.

Step 11:
If we divide 5850 by 639, we get 9 and a remainder of 99.
Use 9 as the next digit of our solution. 
Result so far: 21769.859
Subtract 5751 from 5850 to get 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

Step 12:
If we divide 990 by 639, we get 1 and a remainder of 351.
The number 1 becomes the next digit in our result. 
Result so far: 21769.8591
Subtract 639 from 990 to get 351.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3510, and continue the process.

On to step 13:
If we divide 3510 by 639, we get 5 and a remainder of 315.
Record the quotient 5 as the next digit in the result. 
Result so far: 21769.85915
Subtracting 3195 from 3510 leaves us with 315.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3150, and continue the process.

Step 14:
3150 divided by 639 is 4 with a remainder of 594.
Record the quotient 4 as the next digit in the result. 
Result so far: 21769.859154
If we take 2556 away from 3150, we end up with 594.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5940, and continue the process.

Going ahead to step 15:
If we divide 5940 by 639, we get 9 and a remainder of 189.
Record the quotient 9 as the next digit in the result. 
Result so far: 21769.8591549
Subtracting 5751 from 5940 leaves us with 189.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1890, and continue the process.

Step 16:
When dividing 1890 by 639, we get 2 with a remainder of 612.
Put 2 as the next digit of the answer. 
Result so far: 21769.85915492
If we subtract 1278 from 1890, we get 612.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6120, and continue the process.

The quotient of the division is 21769.85915492, and the remainder is 6.12e-07.