830461 ÷ 21 
Our goal is to divide 830461 by 21.

Advancing to step 1:
21 can be fit into 8 0 times, resulting in a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Bring next digit (3) of the dividend behind the 8 and repeat the process: 83 / 21

Moving on to step 2:
If we divide 83 by 21, we get 3 and a remainder of 20.
Write down 3 as next digit of the result. 
Result so far: 3.0
The remainder is 20 after subtracting 63 from 83.
Grab the next digit (0) from the dividend, add it to 20, then carry on: 200 / 21

Moving on to step 3:
21 goes into 200 9 times with a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 39.0
Deduct 189 from 200 and we're left with 11.
Grab the next digit (4) from the dividend, add it to 11, then carry on: 114 / 21

Let's proceed to step 4:
21 can be fit into 114 5 times, resulting in a remainder of 9.
The next digit of our result is 5. 
Result so far: 395.0
Subtracting 105 from 114 leaves us with 9.
Bring next digit (6) of the dividend behind the 9 and repeat the process: 96 / 21

Moving on to step 5:
21 goes into 96 4 times with a remainder of 12.
The number 4 becomes the next digit in our result. 
Result so far: 3954.0
If we subtract 84 from 96, we get 12.
Grab the next digit (1) from the dividend, add it to 12, then carry on: 121 / 21

Going ahead to step 6:
21 can be fit into 121 5 times, resulting in a remainder of 16.
The next digit of our result is 5. 
Result so far: 39545.0
Subtracting 105 from 121 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 7:
160 divided by 21 is 7 with a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 39545.7
If we subtract 147 from 160, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 8:
21 can be fit into 130 6 times, resulting in a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 39545.76
If we subtract 126 from 130, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 9:
If we divide 40 by 21, we get 1 and a remainder of 19.
The next digit of our result is 1. 
Result so far: 39545.761
Subtracting 21 from 40 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 10:
When dividing 190 by 21, we get 9 with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 39545.7619
If we take 189 away from 190, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 11:
If we divide 10 by 21, we get 0 and a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 39545.7619
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 12:
If we divide 100 by 21, we get 4 and a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 39545.761904
If we subtract 84 from 100, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 13:
21 can be fit into 160 7 times, resulting in a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 39545.7619047
The remainder is 13 after subtracting 147 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 14:
If we divide 130 by 21, we get 6 and a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 39545.76190476
The remainder is 4 after subtracting 126 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

After the division, we end up with 39545.76190476 and a remainder of 4e-09.