21283083 ÷ 721 
Let's see how many times 721 fits into 21283083.

Moving on to step 1:
721 can be fit into 2 0 times, resulting in a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 721

Step 2:
721 goes into 21 0 times with a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Grab the next digit (2) from the dividend, add it to 21, then carry on: 212 / 721

Let's proceed to step 3:
If we divide 212 by 721, we get 0 and a remainder of 212.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 212 after subtracting 0 from 212.
Bring next digit (8) of the dividend behind the 212 and repeat the process: 2128 / 721

Going ahead to step 4:
721 goes into 2128 2 times with a remainder of 686.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
The remainder is 686 after subtracting 1442 from 2128.
Include the next digit (3) from the dividend after 686, then repeat: 6863 / 721

Going ahead to step 5:
721 goes into 6863 9 times with a remainder of 374.
Record the quotient 9 as the next digit in the result. 
Result so far: 29.0
If we take 6489 away from 6863, we end up with 374.
Take the next digit (0) from the dividend and append it to 374, then repeat: 3740 / 721

On to step 6:
If we divide 3740 by 721, we get 5 and a remainder of 135.
Put 5 as the next digit of the answer. 
Result so far: 295.0
Subtract 3605 from 3740 to get 135.
Fetch the next digit (8) from the dividend, attach it to 135 and continue: 1358 / 721

Step 7:
When dividing 1358 by 721, we get 1 with a remainder of 637.
The next digit of our result is 1. 
Result so far: 2951.0
Deduct 721 from 1358 and we're left with 637.
Grab the next digit (3) from the dividend, add it to 637, then carry on: 6373 / 721

On to step 8:
The number 721 fits into 6373 8 times, leaving a remainder of 605.
Use 8 as the next digit of our solution. 
Result so far: 29518.0
The remainder is 605 after subtracting 5768 from 6373.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6050, and continue the process.

Going ahead to step 9:
721 can be fit into 6050 8 times, resulting in a remainder of 282.
Use 8 as the next digit of our solution. 
Result so far: 29518.8
Deduct 5768 from 6050 and we're left with 282.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2820, and continue the process.

Moving on to step 10:
When dividing 2820 by 721, we get 3 with a remainder of 657.
Write down 3 as next digit of the result. 
Result so far: 29518.83
If we take 2163 away from 2820, we end up with 657.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6570, and continue the process.

Advancing to step 11:
721 can be fit into 6570 9 times, resulting in a remainder of 81.
Put 9 as the next digit of the answer. 
Result so far: 29518.839
Subtracting 6489 from 6570 leaves us with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

On to step 12:
If we divide 810 by 721, we get 1 and a remainder of 89.
The next digit of our result is 1. 
Result so far: 29518.8391
Deduct 721 from 810 and we're left with 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Let's proceed to step 13:
721 goes into 890 1 times with a remainder of 169.
Use 1 as the next digit of our solution. 
Result so far: 29518.83911
Subtracting 721 from 890 leaves us with 169.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1690, and continue the process.

The final result is 29518.83911 with a remainder of 0.000169.