We divide 581216 by 21
We want to divide 581216 by 21.

On to step 1:
When dividing 5 by 21, we get 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Include the next digit (8) from the dividend after 5, then repeat: 58 / 21

On to step 2:
If we divide 58 by 21, we get 2 and a remainder of 16.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 42 from 58 to get 16.
Bring next digit (1) of the dividend behind the 16 and repeat the process: 161 / 21

On to step 3:
21 goes into 161 7 times with a remainder of 14.
Put 7 as the next digit of the answer. 
Result so far: 27.0
Deduct 147 from 161 and we're left with 14.
Take the next digit (2) from the dividend and append it to 14, then repeat: 142 / 21

Advancing to step 4:
The number 21 fits into 142 6 times, leaving a remainder of 16.
The number 6 becomes the next digit in our result. 
Result so far: 276.0
Subtract 126 from 142 to get 16.
Include the next digit (1) from the dividend after 16, then repeat: 161 / 21

Step 5:
161 divided by 21 is 7 with a remainder of 14.
Put 7 as the next digit of the answer. 
Result so far: 2767.0
The remainder is 14 after subtracting 147 from 161.
Append the next digit (6) from the dividend to 14 and continue with: 146 / 21

On to step 6:
21 goes into 146 6 times with a remainder of 20.
Put 6 as the next digit of the answer. 
Result so far: 27676.0
Subtracting 126 from 146 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 7:
If we divide 200 by 21, we get 9 and a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 27676.9
Subtracting 189 from 200 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 8:
21 goes into 110 5 times with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 27676.95
Subtract 105 from 110 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 9:
The number 21 fits into 50 2 times, leaving a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 27676.952
If we take 42 away from 50, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 10:
The number 21 fits into 80 3 times, leaving a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 27676.9523
Subtract 63 from 80 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 11:
21 goes into 170 8 times with a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 27676.95238
Deduct 168 from 170 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 12:
The number 21 fits into 20 0 times, leaving a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 27676.95238
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 13:
If we divide 200 by 21, we get 9 and a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 27676.9523809
Subtracting 189 from 200 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 14:
21 goes into 110 5 times with a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 27676.95238095
The remainder is 5 after subtracting 105 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Our division results in 27676.95238095 with a remaining 5e-09.