We divide 856409 by 4
We want to divide 856409 by 4.

Let's proceed to step 1:
4 goes into 8 2 times with a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 0 after subtracting 8 from 8.
Take the next digit (5) from the dividend and append it to 0, then repeat: 5 / 4

Moving on to step 2:
4 can be fit into 5 1 times, resulting in a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 21.0
Subtracting 4 from 5 leaves us with 1.
Bring next digit (6) of the dividend behind the 1 and repeat the process: 16 / 4

On to step 3:
4 can be fit into 16 4 times, resulting in a remainder of 0.
The next digit of our result is 4. 
Result so far: 214.0
The remainder is 0 after subtracting 16 from 16.
Include the next digit (4) from the dividend after 0, then repeat: 4 / 4

Moving on to step 4:
If we divide 4 by 4, we get 1 and a remainder of 0.
The next digit of our result is 1. 
Result so far: 2141.0
Deduct 4 from 4 and we're left with 0.
Include the next digit (0) from the dividend after 0, then repeat: 0 / 4

Step 5:
4 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 21410.0
If we subtract 0 from 0, we get 0.
Fetch the next digit (9) from the dividend, attach it to 0 and continue: 9 / 4

Advancing to step 6:
9 divided by 4 is 2 with a remainder of 1.
Write down 2 as next digit of the result. 
Result so far: 214102.0
If we take 8 away from 9, 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 7:
4 can be fit into 10 2 times, resulting in a remainder of 2.
The next digit of our result is 2. 
Result so far: 214102.2
If we subtract 8 from 10, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 8:
4 goes into 20 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 214102.25
The remainder is 0 after subtracting 20 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 9:
4 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 214102.25
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 10:
The number 4 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 214102.25
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 214102.25 with a remainder of 0.0.