581294 ÷ 21 
Let's see how many times 21 fits into 581294.

Moving 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
Subtract 0 from 5 to get 5.
Grab the next digit (8) from the dividend, add it to 5, then carry on: 58 / 21

Step 2:
The number 21 fits into 58 2 times, leaving a remainder of 16.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we subtract 42 from 58, we get 16.
Bring next digit (1) of the dividend behind the 16 and repeat the process: 161 / 21

Advancing to step 3:
The number 21 fits into 161 7 times, leaving a remainder of 14.
The next digit of our result is 7. 
Result so far: 27.0
Deduct 147 from 161 and we're left with 14.
Include the next digit (2) from the dividend after 14, then repeat: 142 / 21

Let's proceed to step 4:
When dividing 142 by 21, we get 6 with a remainder of 16.
The number 6 becomes the next digit in our result. 
Result so far: 276.0
Subtracting 126 from 142 leaves us with 16.
Take the next digit (9) from the dividend and append it to 16, then repeat: 169 / 21

Let's proceed to step 5:
If we divide 169 by 21, we get 8 and a remainder of 1.
Use 8 as the next digit of our solution. 
Result so far: 2768.0
Subtract 168 from 169 to get 1.
Grab the next digit (4) from the dividend, add it to 1, then carry on: 14 / 21

Let's proceed to step 6:
If we divide 14 by 21, we get 0 and a remainder of 14.
Put 0 as the next digit of the answer. 
Result so far: 27680.0
Deduct 0 from 14 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 7:
21 goes into 140 6 times with a remainder of 14.
The next digit of our result is 6. 
Result so far: 27680.6
Deduct 126 from 140 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 8:
21 can be fit into 140 6 times, resulting in a remainder of 14.
Write down 6 as next digit of the result. 
Result so far: 27680.66
If we subtract 126 from 140, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The final outcome is 27680.66, with a leftover of 0.014.