555781 divided by 21 
Let's see how many times 21 fits into 555781.

On to step 1:
If we divide 5 by 21, we get 0 and a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Take the next digit (5) from the dividend and append it to 5, then repeat: 55 / 21

Let's proceed to step 2:
21 goes into 55 2 times with a remainder of 13.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Deduct 42 from 55 and we're left with 13.
Bring next digit (5) of the dividend behind the 13 and repeat the process: 135 / 21

Going ahead to step 3:
When dividing 135 by 21, we get 6 with a remainder of 9.
Put 6 as the next digit of the answer. 
Result so far: 26.0
If we subtract 126 from 135, we get 9.
Fetch the next digit (7) from the dividend, attach it to 9 and continue: 97 / 21

Moving on to step 4:
The number 21 fits into 97 4 times, leaving a remainder of 13.
Record the quotient 4 as the next digit in the result. 
Result so far: 264.0
If we subtract 84 from 97, we get 13.
Fetch the next digit (8) from the dividend, attach it to 13 and continue: 138 / 21

Let's proceed to step 5:
The number 21 fits into 138 6 times, leaving a remainder of 12.
Use 6 as the next digit of our solution. 
Result so far: 2646.0
Subtracting 126 from 138 leaves us with 12.
Include the next digit (1) from the dividend after 12, then repeat: 121 / 21

On to step 6:
21 can be fit into 121 5 times, resulting in a remainder of 16.
Use 5 as the next digit of our solution. 
Result so far: 26465.0
If we subtract 105 from 121, we 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.

Moving on to step 7:
160 divided by 21 is 7 with a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 26465.7
If we subtract 147 from 160, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 8:
130 divided by 21 is 6 with a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 26465.76
Subtract 126 from 130 to 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.

On to step 9:
21 goes into 40 1 times with a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 26465.761
The remainder is 19 after subtracting 21 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 10:
190 divided by 21 is 9 with a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 26465.7619
Subtracting 189 from 190 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 11:
21 can be fit into 10 0 times, resulting in a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 26465.7619
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 12:
If we divide 100 by 21, we get 4 and a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 26465.761904
Deduct 84 from 100 and we're left 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.

Let's proceed to step 13:
160 divided by 21 is 7 with a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 26465.7619047
Subtract 147 from 160 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 14:
130 divided by 21 is 6 with a remainder of 4.
Use 6 as the next digit of our solution. 
Result so far: 26465.76190476
Subtract 126 from 130 to 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.

The final outcome is 26465.76190476, with a leftover of 4e-09.