85425891 divided by 421 
Our goal is to divide 85425891 by 421.

Moving on to step 1:
When dividing 8 by 421, we get 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (5) from the dividend to 8 and continue with: 85 / 421

Moving on to step 2:
The number 421 fits into 85 0 times, leaving a remainder of 85.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 85, we end up with 85.
Fetch the next digit (4) from the dividend, attach it to 85 and continue: 854 / 421

On to step 3:
When dividing 854 by 421, we get 2 with a remainder of 12.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtracting 842 from 854 leaves us with 12.
Append the next digit (2) from the dividend to 12 and continue with: 122 / 421

Step 4:
421 goes into 122 0 times with a remainder of 122.
The number 0 becomes the next digit in our result. 
Result so far: 20.0
Deduct 0 from 122 and we're left with 122.
Bring next digit (5) of the dividend behind the 122 and repeat the process: 1225 / 421

Moving on to step 5:
421 can be fit into 1225 2 times, resulting in a remainder of 383.
The number 2 becomes the next digit in our result. 
Result so far: 202.0
Subtracting 842 from 1225 leaves us with 383.
Fetch the next digit (8) from the dividend, attach it to 383 and continue: 3838 / 421

On to step 6:
421 can be fit into 3838 9 times, resulting in a remainder of 49.
The next digit of our result is 9. 
Result so far: 2029.0
The remainder is 49 after subtracting 3789 from 3838.
Take the next digit (9) from the dividend and append it to 49, then repeat: 499 / 421

On to step 7:
The number 421 fits into 499 1 times, leaving a remainder of 78.
Write down 1 as next digit of the result. 
Result so far: 20291.0
Deduct 421 from 499 and we're left with 78.
Fetch the next digit (1) from the dividend, attach it to 78 and continue: 781 / 421

Advancing to step 8:
When dividing 781 by 421, we get 1 with a remainder of 360.
Use 1 as the next digit of our solution. 
Result so far: 202911.0
Subtracting 421 from 781 leaves us with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Going ahead to step 9:
The number 421 fits into 3600 8 times, leaving a remainder of 232.
Record the quotient 8 as the next digit in the result. 
Result so far: 202911.8
The remainder is 232 after subtracting 3368 from 3600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

Step 10:
421 can be fit into 2320 5 times, resulting in a remainder of 215.
Write down 5 as next digit of the result. 
Result so far: 202911.85
The remainder is 215 after subtracting 2105 from 2320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

Step 11:
421 goes into 2150 5 times with a remainder of 45.
The number 5 becomes the next digit in our result. 
Result so far: 202911.855
If we subtract 2105 from 2150, we get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

In conclusion, the division gives 202911.855 with a balance of 0.0045.