We look at the division of 85640259 by 645 
We want to divide 85640259 by 645.

On to step 1:
8 divided by 645 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 645

Let's proceed to step 2:
645 goes into 85 0 times with a remainder of 85.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 85 after subtracting 0 from 85.
Bring next digit (6) of the dividend behind the 85 and repeat the process: 856 / 645

Step 3:
645 can be fit into 856 1 times, resulting in a remainder of 211.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 645 from 856 leaves us with 211.
Take the next digit (4) from the dividend and append it to 211, then repeat: 2114 / 645

Going ahead to step 4:
If we divide 2114 by 645, we get 3 and a remainder of 179.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
The remainder is 179 after subtracting 1935 from 2114.
Append the next digit (0) from the dividend to 179 and continue with: 1790 / 645

Step 5:
The number 645 fits into 1790 2 times, leaving a remainder of 500.
The next digit of our result is 2. 
Result so far: 132.0
If we take 1290 away from 1790, we end up with 500.
Grab the next digit (2) from the dividend, add it to 500, then carry on: 5002 / 645

Step 6:
If we divide 5002 by 645, we get 7 and a remainder of 487.
Use 7 as the next digit of our solution. 
Result so far: 1327.0
If we take 4515 away from 5002, we end up with 487.
Take the next digit (5) from the dividend and append it to 487, then repeat: 4875 / 645

Let's proceed to step 7:
When dividing 4875 by 645, we get 7 with a remainder of 360.
Record the quotient 7 as the next digit in the result. 
Result so far: 13277.0
Subtracting 4515 from 4875 leaves us with 360.
Take the next digit (9) from the dividend and append it to 360, then repeat: 3609 / 645

Step 8:
645 goes into 3609 5 times with a remainder of 384.
The number 5 becomes the next digit in our result. 
Result so far: 132775.0
Deduct 3225 from 3609 and we're left with 384.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3840, and continue the process.

Advancing to step 9:
645 can be fit into 3840 5 times, resulting in a remainder of 615.
Use 5 as the next digit of our solution. 
Result so far: 132775.5
The remainder is 615 after subtracting 3225 from 3840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6150, and continue the process.

On to step 10:
6150 divided by 645 is 9 with a remainder of 345.
Put 9 as the next digit of the answer. 
Result so far: 132775.59
If we take 5805 away from 6150, we end up with 345.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3450, and continue the process.

On to step 11:
645 can be fit into 3450 5 times, resulting in a remainder of 225.
Write down 5 as next digit of the result. 
Result so far: 132775.595
If we subtract 3225 from 3450, we get 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

On to step 12:
645 goes into 2250 3 times with a remainder of 315.
Put 3 as the next digit of the answer. 
Result so far: 132775.5953
If we take 1935 away from 2250, we end up with 315.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3150, and continue the process.

Advancing to step 13:
645 can be fit into 3150 4 times, resulting in a remainder of 570.
The number 4 becomes the next digit in our result. 
Result so far: 132775.59534
Deduct 2580 from 3150 and we're left with 570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5700, and continue the process.

Going ahead to step 14:
If we divide 5700 by 645, we get 8 and a remainder of 540.
Put 8 as the next digit of the answer. 
Result so far: 132775.595348
Deduct 5160 from 5700 and we're left with 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5400, and continue the process.

Moving on to step 15:
The number 645 fits into 5400 8 times, leaving a remainder of 240.
The number 8 becomes the next digit in our result. 
Result so far: 132775.5953488
Subtracting 5160 from 5400 leaves us with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Our division results in 132775.5953488 with a remaining 2.4e-06.