We look at the division of 894588 by 21 
We want to divide 894588 by 21.

Step 1:
If we divide 8 by 21, we get 0 and a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Fetch the next digit (9) from the dividend, attach it to 8 and continue: 89 / 21

Going ahead to step 2:
If we divide 89 by 21, we get 4 and a remainder of 5.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we take 84 away from 89, we end up with 5.
Fetch the next digit (4) from the dividend, attach it to 5 and continue: 54 / 21

Let's proceed to step 3:
21 goes into 54 2 times with a remainder of 12.
The number 2 becomes the next digit in our result. 
Result so far: 42.0
The remainder is 12 after subtracting 42 from 54.
Fetch the next digit (5) from the dividend, attach it to 12 and continue: 125 / 21

Going ahead to step 4:
The number 21 fits into 125 5 times, leaving a remainder of 20.
Record the quotient 5 as the next digit in the result. 
Result so far: 425.0
Subtract 105 from 125 to get 20.
Include the next digit (8) from the dividend after 20, then repeat: 208 / 21

Let's proceed to step 5:
When dividing 208 by 21, we get 9 with a remainder of 19.
The next digit of our result is 9. 
Result so far: 4259.0
Subtract 189 from 208 to get 19.
Fetch the next digit (8) from the dividend, attach it to 19 and continue: 198 / 21

Step 6:
21 goes into 198 9 times with a remainder of 9.
Put 9 as the next digit of the answer. 
Result so far: 42599.0
Subtract 189 from 198 to 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 7:
90 divided by 21 is 4 with a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 42599.4
If we subtract 84 from 90, we 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 8:
21 goes into 60 2 times with a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 42599.42
If we subtract 42 from 60, we get 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 9:
When dividing 180 by 21, we get 8 with a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 42599.428
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.

On to step 10:
21 can be fit into 120 5 times, resulting in a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 42599.4285
If we take 105 away from 120, we end up 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.

Let's proceed to step 11:
21 goes into 150 7 times with a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 42599.42857
Deduct 147 from 150 and we're left 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.

On to step 12:
21 goes into 30 1 times with a remainder of 9.
The next digit of our result is 1. 
Result so far: 42599.428571
If we take 21 away from 30, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 13:
When dividing 90 by 21, we get 4 with a remainder of 6.
Put 4 as the next digit of the answer. 
Result so far: 42599.4285714
Deduct 84 from 90 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 14:
21 goes into 60 2 times with a remainder of 18.
The next digit of our result is 2. 
Result so far: 42599.42857142
If we take 42 away from 60, we end up 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.

The final result is 42599.42857142 with a remainder of 1.8e-08.