Let's divide 21961285 by 8
We want to figure out the number of times 21961285 can be divided by 8.

Advancing to step 1:
If we divide 2 by 8, we get 0 and a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 8

Let's proceed to step 2:
If we divide 21 by 8, we get 2 and a remainder of 5.
Put 2 as the next digit of the answer. 
Result so far: 2.0
The remainder is 5 after subtracting 16 from 21.
Take the next digit (9) from the dividend and append it to 5, then repeat: 59 / 8

On to step 3:
8 goes into 59 7 times with a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 27.0
Subtracting 56 from 59 leaves us with 3.
Fetch the next digit (6) from the dividend, attach it to 3 and continue: 36 / 8

Going ahead to step 4:
The number 8 fits into 36 4 times, leaving a remainder of 4.
The number 4 becomes the next digit in our result. 
Result so far: 274.0
Deduct 32 from 36 and we're left with 4.
Take the next digit (1) from the dividend and append it to 4, then repeat: 41 / 8

Let's proceed to step 5:
8 goes into 41 5 times with a remainder of 1.
Record the quotient 5 as the next digit in the result. 
Result so far: 2745.0
Deduct 40 from 41 and we're left with 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 8

Advancing to step 6:
The number 8 fits into 12 1 times, leaving a remainder of 4.
Write down 1 as next digit of the result. 
Result so far: 27451.0
Subtract 8 from 12 to get 4.
Bring next digit (8) of the dividend behind the 4 and repeat the process: 48 / 8

Step 7:
48 divided by 8 is 6 with a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 274516.0
If we subtract 48 from 48, we get 0.
Append the next digit (5) from the dividend to 0 and continue with: 5 / 8

On to step 8:
When dividing 5 by 8, we get 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 2745160.0
Deduct 0 from 5 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 9:
The number 8 fits into 50 6 times, leaving a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 2745160.6
If we subtract 48 from 50, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 10:
If we divide 20 by 8, we get 2 and a remainder of 4.
The next digit of our result is 2. 
Result so far: 2745160.62
Subtracting 16 from 20 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 11:
40 divided by 8 is 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 2745160.625
If we take 40 away from 40, 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.

Moving on to step 12:
The number 8 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 2745160.625
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.

Moving on to step 13:
If we divide 0 by 8, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 2745160.625
The remainder is 0 after subtracting 0 from 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 result is 2745160.625 with a remainder of 0.0.