21518969 ÷ 284 
We want to figure out the number of times 21518969 can be divided by 284.

Step 1:
When dividing 2 by 284, we get 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 284

Moving on to step 2:
When dividing 21 by 284, we get 0 with a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Include the next digit (5) from the dividend after 21, then repeat: 215 / 284

Going ahead to step 3:
284 can be fit into 215 0 times, resulting in a remainder of 215.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 215 and we're left with 215.
Append the next digit (1) from the dividend to 215 and continue with: 2151 / 284

Let's proceed to step 4:
When dividing 2151 by 284, we get 7 with a remainder of 163.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
The remainder is 163 after subtracting 1988 from 2151.
Grab the next digit (8) from the dividend, add it to 163, then carry on: 1638 / 284

Moving on to step 5:
284 goes into 1638 5 times with a remainder of 218.
Put 5 as the next digit of the answer. 
Result so far: 75.0
If we take 1420 away from 1638, we end up with 218.
Take the next digit (9) from the dividend and append it to 218, then repeat: 2189 / 284

Let's proceed to step 6:
The number 284 fits into 2189 7 times, leaving a remainder of 201.
The next digit of our result is 7. 
Result so far: 757.0
If we subtract 1988 from 2189, we get 201.
Bring next digit (6) of the dividend behind the 201 and repeat the process: 2016 / 284

On to step 7:
284 goes into 2016 7 times with a remainder of 28.
Put 7 as the next digit of the answer. 
Result so far: 7577.0
If we subtract 1988 from 2016, we get 28.
Include the next digit (9) from the dividend after 28, then repeat: 289 / 284

Moving on to step 8:
When dividing 289 by 284, we get 1 with a remainder of 5.
Use 1 as the next digit of our solution. 
Result so far: 75771.0
Deduct 284 from 289 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:
50 divided by 284 is 0 with a remainder of 50.
Record the quotient 0 as the next digit in the result. 
Result so far: 75771.0
Subtracting 0 from 50 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 10:
500 divided by 284 is 1 with a remainder of 216.
Use 1 as the next digit of our solution. 
Result so far: 75771.01
Subtracting 284 from 500 leaves us with 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Going ahead to step 11:
The number 284 fits into 2160 7 times, leaving a remainder of 172.
The number 7 becomes the next digit in our result. 
Result so far: 75771.017
The remainder is 172 after subtracting 1988 from 2160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

Moving on to step 12:
When dividing 1720 by 284, we get 6 with a remainder of 16.
The number 6 becomes the next digit in our result. 
Result so far: 75771.0176
Subtract 1704 from 1720 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 13:
When dividing 160 by 284, we get 0 with a remainder of 160.
The number 0 becomes the next digit in our result. 
Result so far: 75771.0176
Subtract 0 from 160 to get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Step 14:
If we divide 1600 by 284, we get 5 and a remainder of 180.
The next digit of our result is 5. 
Result so far: 75771.017605
If we subtract 1420 from 1600, we get 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

On to step 15:
If we divide 1800 by 284, we get 6 and a remainder of 96.
Write down 6 as next digit of the result. 
Result so far: 75771.0176056
If we take 1704 away from 1800, we end up with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

On to step 16:
If we divide 960 by 284, we get 3 and a remainder of 108.
The number 3 becomes the next digit in our result. 
Result so far: 75771.01760563
The remainder is 108 after subtracting 852 from 960.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

The quotient of the division is 75771.01760563, and the remainder is 1.08e-07.