We look at the division of 21308 by 64 
Let's see how many times 64 fits into 21308.

Let's proceed to step 1:
64 goes into 2 0 times with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 64

Moving on to step 2:
64 goes into 21 0 times with a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Fetch the next digit (3) from the dividend, attach it to 21 and continue: 213 / 64

On to step 3:
If we divide 213 by 64, we get 3 and a remainder of 21.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Deduct 192 from 213 and we're left with 21.
Append the next digit (0) from the dividend to 21 and continue with: 210 / 64

Advancing to step 4:
210 divided by 64 is 3 with a remainder of 18.
Use 3 as the next digit of our solution. 
Result so far: 33.0
The remainder is 18 after subtracting 192 from 210.
Append the next digit (8) from the dividend to 18 and continue with: 188 / 64

On to step 5:
64 goes into 188 2 times with a remainder of 60.
Record the quotient 2 as the next digit in the result. 
Result so far: 332.0
Deduct 128 from 188 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 6:
When dividing 600 by 64, we get 9 with a remainder of 24.
The number 9 becomes the next digit in our result. 
Result so far: 332.9
Deduct 576 from 600 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 7:
If we divide 240 by 64, we get 3 and a remainder of 48.
The number 3 becomes the next digit in our result. 
Result so far: 332.93
If we take 192 away from 240, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 8:
The number 64 fits into 480 7 times, leaving a remainder of 32.
Use 7 as the next digit of our solution. 
Result so far: 332.937
Deduct 448 from 480 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Advancing to step 9:
64 goes into 320 5 times with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 332.9375
The remainder is 0 after subtracting 320 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 10:
If we divide 0 by 64, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 332.9375
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 11:
64 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 332.9375
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.

The final result is 332.9375 with a remainder of 0.0.