421966 divided by 85 
Our goal is to divide 421966 by 85.

Step 1:
If we divide 4 by 85, we get 0 and a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Fetch the next digit (2) from the dividend, attach it to 4 and continue: 42 / 85

Advancing to step 2:
85 goes into 42 0 times with a remainder of 42.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 42 after subtracting 0 from 42.
Include the next digit (1) from the dividend after 42, then repeat: 421 / 85

Going ahead to step 3:
When dividing 421 by 85, we get 4 with a remainder of 81.
The next digit of our result is 4. 
Result so far: 4.0
Deduct 340 from 421 and we're left with 81.
Include the next digit (9) from the dividend after 81, then repeat: 819 / 85

Advancing to step 4:
819 divided by 85 is 9 with a remainder of 54.
Write down 9 as next digit of the result. 
Result so far: 49.0
If we take 765 away from 819, we end up with 54.
Bring next digit (6) of the dividend behind the 54 and repeat the process: 546 / 85

On to step 5:
When dividing 546 by 85, we get 6 with a remainder of 36.
The next digit of our result is 6. 
Result so far: 496.0
Subtracting 510 from 546 leaves us with 36.
Grab the next digit (6) from the dividend, add it to 36, then carry on: 366 / 85

Moving on to step 6:
When dividing 366 by 85, we get 4 with a remainder of 26.
The next digit of our result is 4. 
Result so far: 4964.0
If we take 340 away from 366, we end up with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Going ahead to step 7:
The number 85 fits into 260 3 times, leaving a remainder of 5.
The number 3 becomes the next digit in our result. 
Result so far: 4964.3
If we subtract 255 from 260, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 8:
85 can be fit into 50 0 times, resulting in a remainder of 50.
Record the quotient 0 as the next digit in the result. 
Result so far: 4964.3
The remainder is 50 after subtracting 0 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 9:
The number 85 fits into 500 5 times, leaving a remainder of 75.
Use 5 as the next digit of our solution. 
Result so far: 4964.305
Subtract 425 from 500 to get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Let's proceed to step 10:
85 goes into 750 8 times with a remainder of 70.
Write down 8 as next digit of the result. 
Result so far: 4964.3058
Subtracting 680 from 750 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 11:
The number 85 fits into 700 8 times, leaving a remainder of 20.
Write down 8 as next digit of the result. 
Result so far: 4964.30588
The remainder is 20 after subtracting 680 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Our division results in 4964.30588 with a remaining 2e-05.