We divide 21690481 by 28
We want to divide 21690481 by 28.

Going ahead to step 1:
When dividing 2 by 28, we get 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 28

Step 2:
28 can be fit into 21 0 times, resulting in a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Grab the next digit (6) from the dividend, add it to 21, then carry on: 216 / 28

Let's proceed to step 3:
If we divide 216 by 28, we get 7 and a remainder of 20.
The next digit of our result is 7. 
Result so far: 7.0
Subtract 196 from 216 to get 20.
Append the next digit (9) from the dividend to 20 and continue with: 209 / 28

Moving on to step 4:
If we divide 209 by 28, we get 7 and a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 77.0
Subtract 196 from 209 to get 13.
Bring next digit (0) of the dividend behind the 13 and repeat the process: 130 / 28

On to step 5:
If we divide 130 by 28, we get 4 and a remainder of 18.
The number 4 becomes the next digit in our result. 
Result so far: 774.0
Deduct 112 from 130 and we're left with 18.
Grab the next digit (4) from the dividend, add it to 18, then carry on: 184 / 28

Moving on to step 6:
When dividing 184 by 28, we get 6 with a remainder of 16.
Write down 6 as next digit of the result. 
Result so far: 7746.0
Subtract 168 from 184 to get 16.
Grab the next digit (8) from the dividend, add it to 16, then carry on: 168 / 28

Step 7:
The number 28 fits into 168 6 times, leaving a remainder of 0.
Use 6 as the next digit of our solution. 
Result so far: 77466.0
If we subtract 168 from 168, we get 0.
Take the next digit (1) from the dividend and append it to 0, then repeat: 1 / 28

Step 8:
The number 28 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 774660.0
Subtract 0 from 1 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 9:
If we divide 10 by 28, we get 0 and a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 774660.0
If we subtract 0 from 10, 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:
28 goes into 100 3 times with a remainder of 16.
Record the quotient 3 as the next digit in the result. 
Result so far: 774660.03
Deduct 84 from 100 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 11:
When dividing 160 by 28, we get 5 with a remainder of 20.
Use 5 as the next digit of our solution. 
Result so far: 774660.035
Subtract 140 from 160 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 12:
28 can be fit into 200 7 times, resulting in a remainder of 4.
Use 7 as the next digit of our solution. 
Result so far: 774660.0357
Subtracting 196 from 200 leaves us 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 13:
If we divide 40 by 28, we get 1 and a remainder of 12.
Record the quotient 1 as the next digit in the result. 
Result so far: 774660.03571
The remainder is 12 after subtracting 28 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 14:
If we divide 120 by 28, we get 4 and a remainder of 8.
The next digit of our result is 4. 
Result so far: 774660.035714
Subtracting 112 from 120 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.

On to step 15:
28 can be fit into 80 2 times, resulting in a remainder of 24.
Write down 2 as next digit of the result. 
Result so far: 774660.0357142
If we take 56 away from 80, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 16:
When dividing 240 by 28, we get 8 with a remainder of 16.
Use 8 as the next digit of our solution. 
Result so far: 774660.03571428
If we subtract 224 from 240, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

After the division, we end up with 774660.03571428 and a remainder of 1.6e-08.