We're dividing 21638973 by 867 
We want to figure out the number of times 21638973 can be divided by 867.

Going ahead to step 1:
The number 867 fits into 2 0 times, leaving 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.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 867

Let's proceed to step 2:
867 goes into 21 0 times with a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Take the next digit (6) from the dividend and append it to 21, then repeat: 216 / 867

Moving on to step 3:
867 can be fit into 216 0 times, resulting in a remainder of 216.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 216 after subtracting 0 from 216.
Take the next digit (3) from the dividend and append it to 216, then repeat: 2163 / 867

Going ahead to step 4:
If we divide 2163 by 867, we get 2 and a remainder of 429.
Put 2 as the next digit of the answer. 
Result so far: 2.0
The remainder is 429 after subtracting 1734 from 2163.
Include the next digit (8) from the dividend after 429, then repeat: 4298 / 867

On to step 5:
867 goes into 4298 4 times with a remainder of 830.
The number 4 becomes the next digit in our result. 
Result so far: 24.0
The remainder is 830 after subtracting 3468 from 4298.
Append the next digit (9) from the dividend to 830 and continue with: 8309 / 867

Let's proceed to step 6:
8309 divided by 867 is 9 with a remainder of 506.
Write down 9 as next digit of the result. 
Result so far: 249.0
If we take 7803 away from 8309, we end up with 506.
Include the next digit (7) from the dividend after 506, then repeat: 5067 / 867

On to step 7:
If we divide 5067 by 867, we get 5 and a remainder of 732.
Use 5 as the next digit of our solution. 
Result so far: 2495.0
Subtracting 4335 from 5067 leaves us with 732.
Include the next digit (3) from the dividend after 732, then repeat: 7323 / 867

Moving on to step 8:
7323 divided by 867 is 8 with a remainder of 387.
Record the quotient 8 as the next digit in the result. 
Result so far: 24958.0
If we take 6936 away from 7323, we end up with 387.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3870, and continue the process.

Advancing to step 9:
3870 divided by 867 is 4 with a remainder of 402.
Put 4 as the next digit of the answer. 
Result so far: 24958.4
The remainder is 402 after subtracting 3468 from 3870.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4020, and continue the process.

Moving on to step 10:
4020 divided by 867 is 4 with a remainder of 552.
Put 4 as the next digit of the answer. 
Result so far: 24958.44
Subtract 3468 from 4020 to get 552.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5520, and continue the process.

The quotient of the division is 24958.44, and the remainder is 0.552.