We're dividing 85454791 by 642 
Let's see how many times 642 fits into 85454791.

Step 1:
When dividing 8 by 642, we get 0 with 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.
Fetch the next digit (5) from the dividend, attach it to 8 and continue: 85 / 642

Advancing to step 2:
642 can be fit into 85 0 times, resulting in a remainder of 85.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 85 leaves us with 85.
Take the next digit (4) from the dividend and append it to 85, then repeat: 854 / 642

Advancing to step 3:
When dividing 854 by 642, we get 1 with a remainder of 212.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 642 from 854 leaves us with 212.
Fetch the next digit (5) from the dividend, attach it to 212 and continue: 2125 / 642

Moving on to step 4:
642 can be fit into 2125 3 times, resulting in a remainder of 199.
Put 3 as the next digit of the answer. 
Result so far: 13.0
The remainder is 199 after subtracting 1926 from 2125.
Take the next digit (4) from the dividend and append it to 199, then repeat: 1994 / 642

Step 5:
If we divide 1994 by 642, we get 3 and a remainder of 68.
The number 3 becomes the next digit in our result. 
Result so far: 133.0
Subtracting 1926 from 1994 leaves us with 68.
Grab the next digit (7) from the dividend, add it to 68, then carry on: 687 / 642

Step 6:
When dividing 687 by 642, we get 1 with a remainder of 45.
The next digit of our result is 1. 
Result so far: 1331.0
Deduct 642 from 687 and we're left with 45.
Include the next digit (9) from the dividend after 45, then repeat: 459 / 642

Going ahead to step 7:
When dividing 459 by 642, we get 0 with a remainder of 459.
Put 0 as the next digit of the answer. 
Result so far: 13310.0
The remainder is 459 after subtracting 0 from 459.
Append the next digit (1) from the dividend to 459 and continue with: 4591 / 642

Going ahead to step 8:
If we divide 4591 by 642, we get 7 and a remainder of 97.
Record the quotient 7 as the next digit in the result. 
Result so far: 133107.0
Subtracting 4494 from 4591 leaves us with 97.
Since there are no more digits in the dividend, we add a zero to the remainder making it 970, and continue the process.

Let's proceed to step 9:
The number 642 fits into 970 1 times, leaving a remainder of 328.
Write down 1 as next digit of the result. 
Result so far: 133107.1
If we take 642 away from 970, we end up with 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

Advancing to step 10:
642 can be fit into 3280 5 times, resulting in a remainder of 70.
Record the quotient 5 as the next digit in the result. 
Result so far: 133107.15
If we take 3210 away from 3280, we end up 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.

Step 11:
642 goes into 700 1 times with a remainder of 58.
Put 1 as the next digit of the answer. 
Result so far: 133107.151
Subtract 642 from 700 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

On to step 12:
If we divide 580 by 642, we get 0 and a remainder of 580.
Write down 0 as next digit of the result. 
Result so far: 133107.151
Subtract 0 from 580 to get 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

Going ahead to step 13:
642 can be fit into 5800 9 times, resulting in a remainder of 22.
Put 9 as the next digit of the answer. 
Result so far: 133107.15109
The remainder is 22 after subtracting 5778 from 5800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 14:
642 goes into 220 0 times with a remainder of 220.
Put 0 as the next digit of the answer. 
Result so far: 133107.15109
Deduct 0 from 220 and we're left with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

On to step 15:
When dividing 2200 by 642, we get 3 with a remainder of 274.
The next digit of our result is 3. 
Result so far: 133107.1510903
Subtracting 1926 from 2200 leaves us with 274.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2740, and continue the process.

Let's proceed to step 16:
When dividing 2740 by 642, we get 4 with a remainder of 172.
The number 4 becomes the next digit in our result. 
Result so far: 133107.15109034
If we subtract 2568 from 2740, we get 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

After the division, we end up with 133107.15109034 and a remainder of 1.72e-07.