We look at the division of 601673 by 21 
Let's see how many times 21 fits into 601673.

On to step 1:
6 divided by 21 is 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Append the next digit (0) from the dividend to 6 and continue with: 60 / 21

Going ahead to step 2:
60 divided by 21 is 2 with a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 2.0
The remainder is 18 after subtracting 42 from 60.
Fetch the next digit (1) from the dividend, attach it to 18 and continue: 181 / 21

Going ahead to step 3:
If we divide 181 by 21, we get 8 and a remainder of 13.
Put 8 as the next digit of the answer. 
Result so far: 28.0
If we subtract 168 from 181, we get 13.
Grab the next digit (6) from the dividend, add it to 13, then carry on: 136 / 21

Moving on to step 4:
When dividing 136 by 21, we get 6 with a remainder of 10.
Put 6 as the next digit of the answer. 
Result so far: 286.0
Subtracting 126 from 136 leaves us with 10.
Take the next digit (7) from the dividend and append it to 10, then repeat: 107 / 21

Going ahead to step 5:
The number 21 fits into 107 5 times, leaving a remainder of 2.
Put 5 as the next digit of the answer. 
Result so far: 2865.0
Subtract 105 from 107 to get 2.
Fetch the next digit (3) from the dividend, attach it to 2 and continue: 23 / 21

On to step 6:
23 divided by 21 is 1 with a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 28651.0
Deduct 21 from 23 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.

On to step 7:
20 divided by 21 is 0 with a remainder of 20.
The next digit of our result is 0. 
Result so far: 28651.0
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 8:
When dividing 200 by 21, we get 9 with a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 28651.09
Subtract 189 from 200 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 9:
The number 21 fits into 110 5 times, leaving a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 28651.095
If we take 105 away from 110, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 10:
50 divided by 21 is 2 with a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 28651.0952
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 11:
21 goes into 80 3 times with a remainder of 17.
Use 3 as the next digit of our solution. 
Result so far: 28651.09523
Subtracting 63 from 80 leaves us with 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 12:
When dividing 170 by 21, we get 8 with a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 28651.095238
If we take 168 away from 170, we end up 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.

On to step 13:
20 divided by 21 is 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 28651.095238
Deduct 0 from 20 and we're left 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.

Moving on to step 14:
21 goes into 200 9 times with a remainder of 11.
The next digit of our result is 9. 
Result so far: 28651.09523809
If we take 189 away from 200, we end up 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.

Our division results in 28651.09523809 with a remaining 1.1e-08.