305656 divided by 21 
We're looking to find how many times 21 goes into 305656.

Step 1:
The number 21 fits into 3 0 times, leaving a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 21

On to step 2:
The number 21 fits into 30 1 times, leaving a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 21 away from 30, we end up with 9.
Fetch the next digit (5) from the dividend, attach it to 9 and continue: 95 / 21

Moving on to step 3:
21 can be fit into 95 4 times, resulting in a remainder of 11.
Write down 4 as next digit of the result. 
Result so far: 14.0
Subtract 84 from 95 to get 11.
Append the next digit (6) from the dividend to 11 and continue with: 116 / 21

Moving on to step 4:
The number 21 fits into 116 5 times, leaving a remainder of 11.
The number 5 becomes the next digit in our result. 
Result so far: 145.0
If we subtract 105 from 116, we get 11.
Take the next digit (5) from the dividend and append it to 11, then repeat: 115 / 21

On to step 5:
115 divided by 21 is 5 with a remainder of 10.
The next digit of our result is 5. 
Result so far: 1455.0
If we subtract 105 from 115, we get 10.
Append the next digit (6) from the dividend to 10 and continue with: 106 / 21

On to step 6:
If we divide 106 by 21, we get 5 and a remainder of 1.
The number 5 becomes the next digit in our result. 
Result so far: 14555.0
The remainder is 1 after subtracting 105 from 106.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 7:
21 can be fit into 10 0 times, resulting in a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 14555.0
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 8:
The number 21 fits into 100 4 times, leaving a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 14555.04
The remainder is 16 after subtracting 84 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 9:
When dividing 160 by 21, we get 7 with a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 14555.047
Deduct 147 from 160 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 10:
130 divided by 21 is 6 with a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 14555.0476
If we subtract 126 from 130, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 11:
21 can be fit into 40 1 times, resulting in a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 14555.04761
Deduct 21 from 40 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 12:
The number 21 fits into 190 9 times, leaving a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 14555.047619
If we subtract 189 from 190, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 13:
The number 21 fits into 10 0 times, leaving a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 14555.047619
Subtracting 0 from 10 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 14:
100 divided by 21 is 4 with a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 14555.04761904
If we take 84 away from 100, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The final result is 14555.04761904 with a remainder of 1.6e-08.