We divide 416589 by 21
Our goal is to divide 416589 by 21.

Step 1:
21 goes into 4 0 times with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Append the next digit (1) from the dividend to 4 and continue with: 41 / 21

Going ahead to step 2:
21 goes into 41 1 times with a remainder of 20.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 20 after subtracting 21 from 41.
Fetch the next digit (6) from the dividend, attach it to 20 and continue: 206 / 21

Moving on to step 3:
21 goes into 206 9 times with a remainder of 17.
The number 9 becomes the next digit in our result. 
Result so far: 19.0
Subtracting 189 from 206 leaves us with 17.
Take the next digit (5) from the dividend and append it to 17, then repeat: 175 / 21

Step 4:
The number 21 fits into 175 8 times, leaving a remainder of 7.
Record the quotient 8 as the next digit in the result. 
Result so far: 198.0
If we take 168 away from 175, we end up with 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 21

Going ahead to step 5:
When dividing 78 by 21, we get 3 with a remainder of 15.
The next digit of our result is 3. 
Result so far: 1983.0
If we subtract 63 from 78, we get 15.
Include the next digit (9) from the dividend after 15, then repeat: 159 / 21

Going ahead to step 6:
21 can be fit into 159 7 times, resulting in a remainder of 12.
Put 7 as the next digit of the answer. 
Result so far: 19837.0
Deduct 147 from 159 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 7:
The number 21 fits into 120 5 times, leaving a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 19837.5
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.

Going ahead to step 8:
When dividing 150 by 21, we get 7 with a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 19837.57
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.

Moving on to step 9:
If we divide 30 by 21, we get 1 and a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 19837.571
Subtracting 21 from 30 leaves us 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.

Going ahead to step 10:
The number 21 fits into 90 4 times, leaving a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 19837.5714
If we take 84 away from 90, we end up 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.

Advancing to step 11:
21 goes into 60 2 times with a remainder of 18.
The next digit of our result is 2. 
Result so far: 19837.57142
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 12:
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: 19837.571428
Subtracting 168 from 180 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 13:
21 goes into 120 5 times with a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 19837.5714285
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.

Going ahead to step 14:
The number 21 fits into 150 7 times, leaving a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 19837.57142857
If we subtract 147 from 150, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

The final result is 19837.57142857 with a remainder of 3e-09.