We're dividing 21881362 by 863 
We want to figure out the number of times 21881362 can be divided by 863.

Moving on to step 1:
If we divide 2 by 863, we get 0 and a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 863

Advancing to step 2:
The number 863 fits into 21 0 times, leaving a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Bring next digit (8) of the dividend behind the 21 and repeat the process: 218 / 863

Going ahead to step 3:
If we divide 218 by 863, we get 0 and a remainder of 218.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 218 to get 218.
Include the next digit (8) from the dividend after 218, then repeat: 2188 / 863

Moving on to step 4:
863 can be fit into 2188 2 times, resulting in a remainder of 462.
The next digit of our result is 2. 
Result so far: 2.0
If we take 1726 away from 2188, we end up with 462.
Include the next digit (1) from the dividend after 462, then repeat: 4621 / 863

On to step 5:
863 can be fit into 4621 5 times, resulting in a remainder of 306.
Record the quotient 5 as the next digit in the result. 
Result so far: 25.0
Deduct 4315 from 4621 and we're left with 306.
Take the next digit (3) from the dividend and append it to 306, then repeat: 3063 / 863

On to step 6:
863 can be fit into 3063 3 times, resulting in a remainder of 474.
The next digit of our result is 3. 
Result so far: 253.0
Subtracting 2589 from 3063 leaves us with 474.
Take the next digit (6) from the dividend and append it to 474, then repeat: 4746 / 863

Going ahead to step 7:
If we divide 4746 by 863, we get 5 and a remainder of 431.
Put 5 as the next digit of the answer. 
Result so far: 2535.0
If we take 4315 away from 4746, we end up with 431.
Append the next digit (2) from the dividend to 431 and continue with: 4312 / 863

On to step 8:
The number 863 fits into 4312 4 times, leaving a remainder of 860.
The number 4 becomes the next digit in our result. 
Result so far: 25354.0
Deduct 3452 from 4312 and we're left with 860.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8600, and continue the process.

On to step 9:
863 goes into 8600 9 times with a remainder of 833.
The next digit of our result is 9. 
Result so far: 25354.9
The remainder is 833 after subtracting 7767 from 8600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8330, and continue the process.

Let's proceed to step 10:
863 can be fit into 8330 9 times, resulting in a remainder of 563.
Write down 9 as next digit of the result. 
Result so far: 25354.99
If we take 7767 away from 8330, we end up with 563.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5630, and continue the process.

Our division results in 25354.99 with a remaining 0.563.