77415962 divided by 640 
We want to divide 77415962 by 640.

On to step 1:
The number 640 fits into 7 0 times, leaving a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Include the next digit (7) from the dividend after 7, then repeat: 77 / 640

Advancing to step 2:
640 goes into 77 0 times with a remainder of 77.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 77, we get 77.
Bring next digit (4) of the dividend behind the 77 and repeat the process: 774 / 640

On to step 3:
774 divided by 640 is 1 with a remainder of 134.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 640 from 774 leaves us with 134.
Append the next digit (1) from the dividend to 134 and continue with: 1341 / 640

Advancing to step 4:
640 can be fit into 1341 2 times, resulting in a remainder of 61.
Use 2 as the next digit of our solution. 
Result so far: 12.0
Deduct 1280 from 1341 and we're left with 61.
Append the next digit (5) from the dividend to 61 and continue with: 615 / 640

Step 5:
When dividing 615 by 640, we get 0 with a remainder of 615.
Record the quotient 0 as the next digit in the result. 
Result so far: 120.0
If we subtract 0 from 615, we get 615.
Include the next digit (9) from the dividend after 615, then repeat: 6159 / 640

On to step 6:
The number 640 fits into 6159 9 times, leaving a remainder of 399.
Put 9 as the next digit of the answer. 
Result so far: 1209.0
The remainder is 399 after subtracting 5760 from 6159.
Grab the next digit (6) from the dividend, add it to 399, then carry on: 3996 / 640

Step 7:
The number 640 fits into 3996 6 times, leaving a remainder of 156.
The next digit of our result is 6. 
Result so far: 12096.0
Subtracting 3840 from 3996 leaves us with 156.
Grab the next digit (2) from the dividend, add it to 156, then carry on: 1562 / 640

Step 8:
When dividing 1562 by 640, we get 2 with a remainder of 282.
The number 2 becomes the next digit in our result. 
Result so far: 120962.0
The remainder is 282 after subtracting 1280 from 1562.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2820, and continue the process.

Going ahead to step 9:
If we divide 2820 by 640, we get 4 and a remainder of 260.
Write down 4 as next digit of the result. 
Result so far: 120962.4
The remainder is 260 after subtracting 2560 from 2820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

On to step 10:
640 goes into 2600 4 times with a remainder of 40.
Record the quotient 4 as the next digit in the result. 
Result so far: 120962.44
Subtract 2560 from 2600 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

After the division, we end up with 120962.44 and a remainder of 0.04.