We're dividing 85489797 by 640 
We want to divide 85489797 by 640.

Going ahead to step 1:
The number 640 fits into 8 0 times, leaving a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Append the next digit (5) from the dividend to 8 and continue with: 85 / 640

Moving on to step 2:
640 goes into 85 0 times with a remainder of 85.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 85, we end up with 85.
Bring next digit (4) of the dividend behind the 85 and repeat the process: 854 / 640

Going ahead to step 3:
If we divide 854 by 640, we get 1 and a remainder of 214.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 640 from 854 to get 214.
Take the next digit (8) from the dividend and append it to 214, then repeat: 2148 / 640

Moving on to step 4:
If we divide 2148 by 640, we get 3 and a remainder of 228.
Use 3 as the next digit of our solution. 
Result so far: 13.0
If we subtract 1920 from 2148, we get 228.
Grab the next digit (9) from the dividend, add it to 228, then carry on: 2289 / 640

Step 5:
640 goes into 2289 3 times with a remainder of 369.
The next digit of our result is 3. 
Result so far: 133.0
If we subtract 1920 from 2289, we get 369.
Bring next digit (7) of the dividend behind the 369 and repeat the process: 3697 / 640

Step 6:
3697 divided by 640 is 5 with a remainder of 497.
Write down 5 as next digit of the result. 
Result so far: 1335.0
If we subtract 3200 from 3697, we get 497.
Grab the next digit (9) from the dividend, add it to 497, then carry on: 4979 / 640

Moving on to step 7:
The number 640 fits into 4979 7 times, leaving a remainder of 499.
The next digit of our result is 7. 
Result so far: 13357.0
Subtracting 4480 from 4979 leaves us with 499.
Bring next digit (7) of the dividend behind the 499 and repeat the process: 4997 / 640

On to step 8:
The number 640 fits into 4997 7 times, leaving a remainder of 517.
Write down 7 as next digit of the result. 
Result so far: 133577.0
The remainder is 517 after subtracting 4480 from 4997.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5170, and continue the process.

Advancing to step 9:
If we divide 5170 by 640, we get 8 and a remainder of 50.
The number 8 becomes the next digit in our result. 
Result so far: 133577.8
Deduct 5120 from 5170 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 10:
640 can be fit into 500 0 times, resulting in a remainder of 500.
The next digit of our result is 0. 
Result so far: 133577.8
Subtracting 0 from 500 leaves us with 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Let's proceed to step 11:
The number 640 fits into 5000 7 times, leaving a remainder of 520.
Use 7 as the next digit of our solution. 
Result so far: 133577.807
If we take 4480 away from 5000, we end up with 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Advancing to step 12:
5200 divided by 640 is 8 with a remainder of 80.
Put 8 as the next digit of the answer. 
Result so far: 133577.8078
The remainder is 80 after subtracting 5120 from 5200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 13:
640 goes into 800 1 times with a remainder of 160.
Record the quotient 1 as the next digit in the result. 
Result so far: 133577.80781
Deduct 640 from 800 and we're left with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Going ahead to step 14:
640 goes into 1600 2 times with a remainder of 320.
The next digit of our result is 2. 
Result so far: 133577.807812
The remainder is 320 after subtracting 1280 from 1600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Step 15:
The number 640 fits into 3200 5 times, leaving a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 133577.8078125
Deduct 3200 from 3200 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 16:
640 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 133577.8078125
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 133577.8078125 with a remaining 0.0.