20143889 ÷ 721 
We're looking to find how many times 721 goes into 20143889.

Advancing to step 1:
If we divide 2 by 721, we get 0 and a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 721

Moving on to step 2:
721 can be fit into 20 0 times, resulting in a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 20 leaves us with 20.
Append the next digit (1) from the dividend to 20 and continue with: 201 / 721

Going ahead to step 3:
The number 721 fits into 201 0 times, leaving a remainder of 201.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 201 and we're left with 201.
Append the next digit (4) from the dividend to 201 and continue with: 2014 / 721

Let's proceed to step 4:
If we divide 2014 by 721, we get 2 and a remainder of 572.
Write down 2 as next digit of the result. 
Result so far: 2.0
The remainder is 572 after subtracting 1442 from 2014.
Fetch the next digit (3) from the dividend, attach it to 572 and continue: 5723 / 721

Moving on to step 5:
5723 divided by 721 is 7 with a remainder of 676.
The number 7 becomes the next digit in our result. 
Result so far: 27.0
Deduct 5047 from 5723 and we're left with 676.
Fetch the next digit (8) from the dividend, attach it to 676 and continue: 6768 / 721

Moving on to step 6:
721 can be fit into 6768 9 times, resulting in a remainder of 279.
Put 9 as the next digit of the answer. 
Result so far: 279.0
If we subtract 6489 from 6768, we get 279.
Bring next digit (8) of the dividend behind the 279 and repeat the process: 2798 / 721

Advancing to step 7:
When dividing 2798 by 721, we get 3 with a remainder of 635.
The next digit of our result is 3. 
Result so far: 2793.0
Deduct 2163 from 2798 and we're left with 635.
Grab the next digit (9) from the dividend, add it to 635, then carry on: 6359 / 721

On to step 8:
721 goes into 6359 8 times with a remainder of 591.
The number 8 becomes the next digit in our result. 
Result so far: 27938.0
Deduct 5768 from 6359 and we're left with 591.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5910, and continue the process.

Going ahead to step 9:
The number 721 fits into 5910 8 times, leaving a remainder of 142.
Put 8 as the next digit of the answer. 
Result so far: 27938.8
If we take 5768 away from 5910, we end up with 142.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1420, and continue the process.

Moving on to step 10:
The number 721 fits into 1420 1 times, leaving a remainder of 699.
The next digit of our result is 1. 
Result so far: 27938.81
Subtracting 721 from 1420 leaves us with 699.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6990, and continue the process.

Going ahead to step 11:
721 goes into 6990 9 times with a remainder of 501.
The number 9 becomes the next digit in our result. 
Result so far: 27938.819
Subtract 6489 from 6990 to get 501.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5010, and continue the process.

Step 12:
When dividing 5010 by 721, we get 6 with a remainder of 684.
Use 6 as the next digit of our solution. 
Result so far: 27938.8196
Subtracting 4326 from 5010 leaves us with 684.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6840, and continue the process.

Going ahead to step 13:
6840 divided by 721 is 9 with a remainder of 351.
Record the quotient 9 as the next digit in the result. 
Result so far: 27938.81969
Deduct 6489 from 6840 and we're left with 351.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3510, and continue the process.

Moving on to step 14:
The number 721 fits into 3510 4 times, leaving a remainder of 626.
Use 4 as the next digit of our solution. 
Result so far: 27938.819694
If we take 2884 away from 3510, we end up with 626.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6260, and continue the process.

Step 15:
721 can be fit into 6260 8 times, resulting in a remainder of 492.
The number 8 becomes the next digit in our result. 
Result so far: 27938.8196948
The remainder is 492 after subtracting 5768 from 6260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4920, and continue the process.

Moving on to step 16:
When dividing 4920 by 721, we get 6 with a remainder of 594.
Use 6 as the next digit of our solution. 
Result so far: 27938.81969486
Subtracting 4326 from 4920 leaves us 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.

The final result is 27938.81969486 with a remainder of 5.94e-07.