We look at the division of 21206650 by 648 
We're looking to find how many times 648 goes into 21206650.

Let's proceed to 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
Subtract 0 from 2 to get 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 648

On to step 2:
If we divide 21 by 648, we get 0 and a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 21, we end up with 21.
Append the next digit (2) from the dividend to 21 and continue with: 212 / 648

Step 3:
If we divide 212 by 648, we get 0 and a remainder of 212.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 212 and we're left with 212.
Grab the next digit (0) from the dividend, add it to 212, then carry on: 2120 / 648

Going ahead to step 4:
2120 divided by 648 is 3 with a remainder of 176.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtracting 1944 from 2120 leaves us with 176.
Include the next digit (6) from the dividend after 176, then repeat: 1766 / 648

Moving on to step 5:
648 can be fit into 1766 2 times, resulting in a remainder of 470.
Put 2 as the next digit of the answer. 
Result so far: 32.0
The remainder is 470 after subtracting 1296 from 1766.
Append the next digit (6) from the dividend to 470 and continue with: 4706 / 648

Advancing to step 6:
If we divide 4706 by 648, we get 7 and a remainder of 170.
Use 7 as the next digit of our solution. 
Result so far: 327.0
If we subtract 4536 from 4706, we get 170.
Take the next digit (5) from the dividend and append it to 170, then repeat: 1705 / 648

Moving on to step 7:
1705 divided by 648 is 2 with a remainder of 409.
Use 2 as the next digit of our solution. 
Result so far: 3272.0
Subtract 1296 from 1705 to get 409.
Append the next digit (0) from the dividend to 409 and continue with: 4090 / 648

Going ahead to step 8:
648 can be fit into 4090 6 times, resulting in a remainder of 202.
Use 6 as the next digit of our solution. 
Result so far: 32726.0
If we subtract 3888 from 4090, we get 202.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2020, and continue the process.

Step 9:
648 can be fit into 2020 3 times, resulting in a remainder of 76.
Write down 3 as next digit of the result. 
Result so far: 32726.3
Subtracting 1944 from 2020 leaves us with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Step 10:
The number 648 fits into 760 1 times, leaving a remainder of 112.
Record the quotient 1 as the next digit in the result. 
Result so far: 32726.31
If we take 648 away from 760, we end up with 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Let's proceed to step 11:
When dividing 1120 by 648, we get 1 with a remainder of 472.
Use 1 as the next digit of our solution. 
Result so far: 32726.311
The remainder is 472 after subtracting 648 from 1120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4720, and continue the process.

The quotient of the division is 32726.311, and the remainder is 0.0472.