We look at the division of 21928001 by 648 
We're looking to find how many times 648 goes into 21928001.

Step 1:
The number 648 fits into 2 0 times, leaving a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 648

Moving on to step 2:
If we divide 21 by 648, we get 0 and a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Include the next digit (9) from the dividend after 21, then repeat: 219 / 648

Going ahead to step 3:
648 goes into 219 0 times with a remainder of 219.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 219, we end up with 219.
Append the next digit (2) from the dividend to 219 and continue with: 2192 / 648

Advancing to step 4:
2192 divided by 648 is 3 with a remainder of 248.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we subtract 1944 from 2192, we get 248.
Grab the next digit (8) from the dividend, add it to 248, then carry on: 2488 / 648

Advancing to step 5:
2488 divided by 648 is 3 with a remainder of 544.
The number 3 becomes the next digit in our result. 
Result so far: 33.0
Subtract 1944 from 2488 to get 544.
Take the next digit (0) from the dividend and append it to 544, then repeat: 5440 / 648

Let's proceed to step 6:
If we divide 5440 by 648, we get 8 and a remainder of 256.
Use 8 as the next digit of our solution. 
Result so far: 338.0
Deduct 5184 from 5440 and we're left with 256.
Include the next digit (0) from the dividend after 256, then repeat: 2560 / 648

On to step 7:
648 goes into 2560 3 times with a remainder of 616.
Write down 3 as next digit of the result. 
Result so far: 3383.0
The remainder is 616 after subtracting 1944 from 2560.
Append the next digit (1) from the dividend to 616 and continue with: 6161 / 648

Moving on to step 8:
When dividing 6161 by 648, we get 9 with a remainder of 329.
Record the quotient 9 as the next digit in the result. 
Result so far: 33839.0
Subtract 5832 from 6161 to get 329.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3290, and continue the process.

Moving on to step 9:
When dividing 3290 by 648, we get 5 with a remainder of 50.
The number 5 becomes the next digit in our result. 
Result so far: 33839.5
The remainder is 50 after subtracting 3240 from 3290.
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 648 is 0 with a remainder of 500.
The number 0 becomes the next digit in our result. 
Result so far: 33839.5
Subtracting 0 from 500 leaves us with 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Moving on to step 11:
648 can be fit into 5000 7 times, resulting in a remainder of 464.
Put 7 as the next digit of the answer. 
Result so far: 33839.507
Subtract 4536 from 5000 to get 464.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4640, and continue the process.

On to step 12:
648 goes into 4640 7 times with a remainder of 104.
Write down 7 as next digit of the result. 
Result so far: 33839.5077
The remainder is 104 after subtracting 4536 from 4640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

The quotient of the division is 33839.5077, and the remainder is 0.00104.