We look at the division of 645543 by 85 
We want to figure out the number of times 645543 can be divided by 85.

Step 1:
6 divided by 85 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 85

Going ahead to step 2:
85 goes into 64 0 times with a remainder of 64.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 64 to get 64.
Include the next digit (5) from the dividend after 64, then repeat: 645 / 85

Moving on to step 3:
645 divided by 85 is 7 with a remainder of 50.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Deduct 595 from 645 and we're left with 50.
Include the next digit (5) from the dividend after 50, then repeat: 505 / 85

Step 4:
When dividing 505 by 85, we get 5 with a remainder of 80.
Use 5 as the next digit of our solution. 
Result so far: 75.0
Deduct 425 from 505 and we're left with 80.
Grab the next digit (4) from the dividend, add it to 80, then carry on: 804 / 85

Advancing to step 5:
The number 85 fits into 804 9 times, leaving a remainder of 39.
The number 9 becomes the next digit in our result. 
Result so far: 759.0
Deduct 765 from 804 and we're left with 39.
Take the next digit (3) from the dividend and append it to 39, then repeat: 393 / 85

Moving on to step 6:
The number 85 fits into 393 4 times, leaving a remainder of 53.
Write down 4 as next digit of the result. 
Result so far: 7594.0
Subtracting 340 from 393 leaves us with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Moving on to step 7:
If we divide 530 by 85, we get 6 and a remainder of 20.
The number 6 becomes the next digit in our result. 
Result so far: 7594.6
If we take 510 away from 530, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 8:
If we divide 200 by 85, we get 2 and a remainder of 30.
Put 2 as the next digit of the answer. 
Result so far: 7594.62
Subtracting 170 from 200 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 9:
The number 85 fits into 300 3 times, leaving a remainder of 45.
Record the quotient 3 as the next digit in the result. 
Result so far: 7594.623
If we subtract 255 from 300, 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.

Going ahead to step 10:
If we divide 450 by 85, we get 5 and a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 7594.6235
Subtract 425 from 450 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 11:
250 divided by 85 is 2 with a remainder of 80.
The number 2 becomes the next digit in our result. 
Result so far: 7594.62352
Deduct 170 from 250 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 12:
85 can be fit into 800 9 times, resulting in a remainder of 35.
The number 9 becomes the next digit in our result. 
Result so far: 7594.623529
If we subtract 765 from 800, we get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Advancing to step 13:
350 divided by 85 is 4 with a remainder of 10.
The number 4 becomes the next digit in our result. 
Result so far: 7594.6235294
If we take 340 away from 350, we end up 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.

Let's proceed to step 14:
85 goes into 100 1 times with a remainder of 15.
Put 1 as the next digit of the answer. 
Result so far: 7594.62352941
Subtract 85 from 100 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

In conclusion, the division gives 7594.62352941 with a balance of 1.5e-08.