We look at the division of 558765 by 21 
We want to figure out the number of times 558765 can be divided by 21.

Advancing to step 1:
When dividing 5 by 21, we get 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Bring next digit (5) of the dividend behind the 5 and repeat the process: 55 / 21

Let's proceed to step 2:
The number 21 fits into 55 2 times, leaving a remainder of 13.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtracting 42 from 55 leaves us with 13.
Append the next digit (8) from the dividend to 13 and continue with: 138 / 21

Moving on to step 3:
21 goes into 138 6 times with a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 26.0
The remainder is 12 after subtracting 126 from 138.
Grab the next digit (7) from the dividend, add it to 12, then carry on: 127 / 21

Advancing to step 4:
127 divided by 21 is 6 with a remainder of 1.
The next digit of our result is 6. 
Result so far: 266.0
If we subtract 126 from 127, we get 1.
Include the next digit (6) from the dividend after 1, then repeat: 16 / 21

On to step 5:
16 divided by 21 is 0 with a remainder of 16.
Write down 0 as next digit of the result. 
Result so far: 2660.0
The remainder is 16 after subtracting 0 from 16.
Grab the next digit (5) from the dividend, add it to 16, then carry on: 165 / 21

Advancing to step 6:
If we divide 165 by 21, we get 7 and a remainder of 18.
The number 7 becomes the next digit in our result. 
Result so far: 26607.0
Deduct 147 from 165 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 7:
21 goes into 180 8 times with a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 26607.8
The remainder is 12 after subtracting 168 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 8:
If we divide 120 by 21, we get 5 and a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 26607.85
Subtracting 105 from 120 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 9:
21 goes into 150 7 times with a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 26607.857
If we take 147 away from 150, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 10:
If we divide 30 by 21, we get 1 and a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 26607.8571
If we subtract 21 from 30, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 11:
When dividing 90 by 21, we get 4 with a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 26607.85714
Subtract 84 from 90 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 12:
21 can be fit into 60 2 times, resulting in a remainder of 18.
The next digit of our result is 2. 
Result so far: 26607.857142
Subtracting 42 from 60 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 13:
When dividing 180 by 21, we get 8 with a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 26607.8571428
If we subtract 168 from 180, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 14:
21 can be fit into 120 5 times, resulting in a remainder of 15.
The next digit of our result is 5. 
Result so far: 26607.85714285
If we subtract 105 from 120, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

In conclusion, the division gives 26607.85714285 with a balance of 1.5e-08.