834178 ÷ 21 
Our goal is to divide 834178 by 21.

On to step 1:
The number 21 fits into 8 0 times, leaving a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Bring next digit (3) of the dividend behind the 8 and repeat the process: 83 / 21

Let's proceed to step 2:
21 goes into 83 3 times with a remainder of 20.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtracting 63 from 83 leaves us with 20.
Take the next digit (4) from the dividend and append it to 20, then repeat: 204 / 21

Step 3:
If we divide 204 by 21, we get 9 and a remainder of 15.
Write down 9 as next digit of the result. 
Result so far: 39.0
If we subtract 189 from 204, we get 15.
Include the next digit (1) from the dividend after 15, then repeat: 151 / 21

Going ahead to step 4:
21 goes into 151 7 times with a remainder of 4.
Use 7 as the next digit of our solution. 
Result so far: 397.0
Subtracting 147 from 151 leaves us with 4.
Append the next digit (7) from the dividend to 4 and continue with: 47 / 21

Step 5:
21 goes into 47 2 times with a remainder of 5.
The next digit of our result is 2. 
Result so far: 3972.0
Subtracting 42 from 47 leaves us with 5.
Grab the next digit (8) from the dividend, add it to 5, then carry on: 58 / 21

Moving on to step 6:
21 can be fit into 58 2 times, resulting in a remainder of 16.
Write down 2 as next digit of the result. 
Result so far: 39722.0
If we subtract 42 from 58, 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.

On to step 7:
21 goes into 160 7 times with a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 39722.7
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:
When dividing 130 by 21, we get 6 with a remainder of 4.
Use 6 as the next digit of our solution. 
Result so far: 39722.76
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.

Let's proceed to step 9:
21 goes into 40 1 times with a remainder of 19.
The next digit of our result is 1. 
Result so far: 39722.761
Deduct 21 from 40 and we're left 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.
Record the quotient 9 as the next digit in the result. 
Result so far: 39722.7619
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.

On to step 11:
When dividing 10 by 21, we get 0 with a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 39722.7619
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 12:
21 can be fit into 100 4 times, resulting in a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 39722.761904
Subtract 84 from 100 to 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.

Moving on to step 13:
21 can be fit into 160 7 times, resulting in a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 39722.7619047
Subtracting 147 from 160 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 14:
21 goes into 130 6 times with a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 39722.76190476
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.

In conclusion, the division gives 39722.76190476 with a balance of 4e-09.