Let's divide 21584140 by 8
We want to figure out the number of times 21584140 can be divided by 8.

Let's proceed to step 1:
When dividing 2 by 8, we get 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 8

Moving on to step 2:
If we divide 21 by 8, we get 2 and a remainder of 5.
The next digit of our result is 2. 
Result so far: 2.0
Deduct 16 from 21 and we're left with 5.
Bring next digit (5) of the dividend behind the 5 and repeat the process: 55 / 8

On to step 3:
8 goes into 55 6 times with a remainder of 7.
Record the quotient 6 as the next digit in the result. 
Result so far: 26.0
Subtract 48 from 55 to get 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 8

Let's proceed to step 4:
When dividing 78 by 8, we get 9 with a remainder of 6.
Record the quotient 9 as the next digit in the result. 
Result so far: 269.0
Subtract 72 from 78 to get 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 8

Advancing to step 5:
64 divided by 8 is 8 with a remainder of 0.
The number 8 becomes the next digit in our result. 
Result so far: 2698.0
Subtracting 64 from 64 leaves us with 0.
Fetch the next digit (1) from the dividend, attach it to 0 and continue: 1 / 8

Advancing to step 6:
If we divide 1 by 8, we get 0 and a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 26980.0
If we subtract 0 from 1, we get 1.
Take the next digit (4) from the dividend and append it to 1, then repeat: 14 / 8

Let's proceed to step 7:
14 divided by 8 is 1 with a remainder of 6.
The next digit of our result is 1. 
Result so far: 269801.0
Deduct 8 from 14 and we're left with 6.
Grab the next digit (0) from the dividend, add it to 6, then carry on: 60 / 8

Going ahead to step 8:
8 goes into 60 7 times with a remainder of 4.
Put 7 as the next digit of the answer. 
Result so far: 2698017.0
The remainder is 4 after subtracting 56 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 9:
When dividing 40 by 8, we get 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 2698017.5
Deduct 40 from 40 and we're left 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 10:
The number 8 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 2698017.5
Subtracting 0 from 0 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.

Let's proceed to step 11:
0 divided by 8 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 2698017.5
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.

After the division, we end up with 2698017.5 and a remainder of 0.0.