We're dividing 21290281 by 16 
Our goal is to divide 21290281 by 16.

Moving on to step 1:
2 divided by 16 is 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
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 / 16

Step 2:
21 divided by 16 is 1 with a remainder of 5.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 16 away from 21, we end up with 5.
Take the next digit (2) from the dividend and append it to 5, then repeat: 52 / 16

On to step 3:
When dividing 52 by 16, we get 3 with a remainder of 4.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
Subtracting 48 from 52 leaves us with 4.
Include the next digit (9) from the dividend after 4, then repeat: 49 / 16

Going ahead to step 4:
16 goes into 49 3 times with a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 133.0
Subtract 48 from 49 to get 1.
Append the next digit (0) from the dividend to 1 and continue with: 10 / 16

On to step 5:
16 can be fit into 10 0 times, resulting in a remainder of 10.
The next digit of our result is 0. 
Result so far: 1330.0
If we take 0 away from 10, we end up with 10.
Grab the next digit (2) from the dividend, add it to 10, then carry on: 102 / 16

Advancing to step 6:
16 can be fit into 102 6 times, resulting in a remainder of 6.
Record the quotient 6 as the next digit in the result. 
Result so far: 13306.0
If we take 96 away from 102, we end up with 6.
Fetch the next digit (8) from the dividend, attach it to 6 and continue: 68 / 16

Going ahead to step 7:
16 can be fit into 68 4 times, resulting in a remainder of 4.
Put 4 as the next digit of the answer. 
Result so far: 133064.0
Deduct 64 from 68 and we're left with 4.
Take the next digit (1) from the dividend and append it to 4, then repeat: 41 / 16

On to step 8:
16 goes into 41 2 times with a remainder of 9.
Use 2 as the next digit of our solution. 
Result so far: 1330642.0
Subtract 32 from 41 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 9:
When dividing 90 by 16, we get 5 with a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 1330642.5
If we subtract 80 from 90, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 10:
When dividing 100 by 16, we get 6 with a remainder of 4.
The next digit of our result is 6. 
Result so far: 1330642.56
If we take 96 away from 100, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 11:
16 can be fit into 40 2 times, resulting in a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 1330642.562
Subtracting 32 from 40 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 12:
16 can be fit into 80 5 times, resulting in a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 1330642.5625
Subtracting 80 from 80 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.

Step 13:
The number 16 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 1330642.5625
If we take 0 away from 0, we end up 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.

Advancing to step 14:
0 divided by 16 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 1330642.5625
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 1330642.5625, with a leftover of 0.0.