21820919 divided by 15 
We want to figure out the number of times 21820919 can be divided by 15.

Let's proceed to step 1:
When dividing 2 by 15, we get 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 15

Let's proceed to step 2:
15 goes into 21 1 times with a remainder of 6.
The next digit of our result is 1. 
Result so far: 1.0
If we take 15 away from 21, we end up with 6.
Include the next digit (8) from the dividend after 6, then repeat: 68 / 15

Going ahead to step 3:
15 goes into 68 4 times with a remainder of 8.
Put 4 as the next digit of the answer. 
Result so far: 14.0
Deduct 60 from 68 and we're left with 8.
Fetch the next digit (2) from the dividend, attach it to 8 and continue: 82 / 15

Advancing to step 4:
15 can be fit into 82 5 times, resulting in a remainder of 7.
The next digit of our result is 5. 
Result so far: 145.0
Deduct 75 from 82 and we're left with 7.
Append the next digit (0) from the dividend to 7 and continue with: 70 / 15

Advancing to step 5:
15 goes into 70 4 times with a remainder of 10.
The number 4 becomes the next digit in our result. 
Result so far: 1454.0
If we take 60 away from 70, we end up with 10.
Fetch the next digit (9) from the dividend, attach it to 10 and continue: 109 / 15

Step 6:
If we divide 109 by 15, we get 7 and a remainder of 4.
Use 7 as the next digit of our solution. 
Result so far: 14547.0
If we subtract 105 from 109, we get 4.
Bring next digit (1) of the dividend behind the 4 and repeat the process: 41 / 15

Advancing to step 7:
The number 15 fits into 41 2 times, leaving a remainder of 11.
The next digit of our result is 2. 
Result so far: 145472.0
Deduct 30 from 41 and we're left with 11.
Append the next digit (9) from the dividend to 11 and continue with: 119 / 15

Step 8:
The number 15 fits into 119 7 times, leaving a remainder of 14.
Record the quotient 7 as the next digit in the result. 
Result so far: 1454727.0
If we subtract 105 from 119, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 9:
140 divided by 15 is 9 with a remainder of 5.
Put 9 as the next digit of the answer. 
Result so far: 1454727.9
Subtract 135 from 140 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 10:
15 goes into 50 3 times with a remainder of 5.
The number 3 becomes the next digit in our result. 
Result so far: 1454727.93
The remainder is 5 after subtracting 45 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 11:
When dividing 50 by 15, we get 3 with a remainder of 5.
The number 3 becomes the next digit in our result. 
Result so far: 1454727.933
Subtracting 45 from 50 leaves us 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.

Our division results in 1454727.933 with a remaining 0.0005.