We look at the division of 66945660 by 640 
Our goal is to divide 66945660 by 640.

On to step 1:
6 divided by 640 is 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 640

Going ahead to step 2:
If we divide 66 by 640, we get 0 and a remainder of 66.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 66 after subtracting 0 from 66.
Append the next digit (9) from the dividend to 66 and continue with: 669 / 640

Advancing to step 3:
640 goes into 669 1 times with a remainder of 29.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 640 away from 669, we end up with 29.
Grab the next digit (4) from the dividend, add it to 29, then carry on: 294 / 640

Let's proceed to step 4:
If we divide 294 by 640, we get 0 and a remainder of 294.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Subtract 0 from 294 to get 294.
Bring next digit (5) of the dividend behind the 294 and repeat the process: 2945 / 640

On to step 5:
2945 divided by 640 is 4 with a remainder of 385.
Put 4 as the next digit of the answer. 
Result so far: 104.0
Subtract 2560 from 2945 to get 385.
Grab the next digit (6) from the dividend, add it to 385, then carry on: 3856 / 640

Moving on to step 6:
When dividing 3856 by 640, we get 6 with a remainder of 16.
Use 6 as the next digit of our solution. 
Result so far: 1046.0
The remainder is 16 after subtracting 3840 from 3856.
Grab the next digit (6) from the dividend, add it to 16, then carry on: 166 / 640

Going ahead to step 7:
If we divide 166 by 640, we get 0 and a remainder of 166.
The number 0 becomes the next digit in our result. 
Result so far: 10460.0
If we take 0 away from 166, we end up with 166.
Grab the next digit (0) from the dividend, add it to 166, then carry on: 1660 / 640

Step 8:
The number 640 fits into 1660 2 times, leaving a remainder of 380.
Write down 2 as next digit of the result. 
Result so far: 104602.0
Subtract 1280 from 1660 to get 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Going ahead to step 9:
640 goes into 3800 5 times with a remainder of 600.
The number 5 becomes the next digit in our result. 
Result so far: 104602.5
If we subtract 3200 from 3800, we get 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Moving on to step 10:
The number 640 fits into 6000 9 times, leaving a remainder of 240.
Write down 9 as next digit of the result. 
Result so far: 104602.59
Subtracting 5760 from 6000 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.

On to step 11:
2400 divided by 640 is 3 with a remainder of 480.
The next digit of our result is 3. 
Result so far: 104602.593
The remainder is 480 after subtracting 1920 from 2400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

On to step 12:
640 can be fit into 4800 7 times, resulting in a remainder of 320.
The number 7 becomes the next digit in our result. 
Result so far: 104602.5937
Subtracting 4480 from 4800 leaves us with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Step 13:
640 goes into 3200 5 times with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 104602.59375
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.

Let's proceed to step 14:
640 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 104602.59375
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 15:
640 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 104602.59375
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.

In conclusion, the division gives 104602.59375 with a balance of 0.0.