640550 divided by 77 
We want to figure out the number of times 640550 can be divided by 77.

Going ahead to step 1:
The number 77 fits into 6 0 times, leaving a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 77

Step 2:
When dividing 64 by 77, we get 0 with a remainder of 64.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 64 leaves us with 64.
Bring next digit (0) of the dividend behind the 64 and repeat the process: 640 / 77

Step 3:
77 can be fit into 640 8 times, resulting in a remainder of 24.
The next digit of our result is 8. 
Result so far: 8.0
If we subtract 616 from 640, we get 24.
Grab the next digit (5) from the dividend, add it to 24, then carry on: 245 / 77

Moving on to step 4:
77 can be fit into 245 3 times, resulting in a remainder of 14.
Use 3 as the next digit of our solution. 
Result so far: 83.0
Deduct 231 from 245 and we're left with 14.
Grab the next digit (5) from the dividend, add it to 14, then carry on: 145 / 77

Advancing to step 5:
77 goes into 145 1 times with a remainder of 68.
Use 1 as the next digit of our solution. 
Result so far: 831.0
Subtract 77 from 145 to get 68.
Bring next digit (0) of the dividend behind the 68 and repeat the process: 680 / 77

On to step 6:
77 can be fit into 680 8 times, resulting in a remainder of 64.
The next digit of our result is 8. 
Result so far: 8318.0
Deduct 616 from 680 and we're left with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Step 7:
The number 77 fits into 640 8 times, leaving a remainder of 24.
The next digit of our result is 8. 
Result so far: 8318.8
Subtract 616 from 640 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 8:
77 can be fit into 240 3 times, resulting in a remainder of 9.
Use 3 as the next digit of our solution. 
Result so far: 8318.83
The remainder is 9 after subtracting 231 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 9:
77 can be fit into 90 1 times, resulting in a remainder of 13.
Use 1 as the next digit of our solution. 
Result so far: 8318.831
Subtracting 77 from 90 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 10:
130 divided by 77 is 1 with a remainder of 53.
Use 1 as the next digit of our solution. 
Result so far: 8318.8311
Deduct 77 from 130 and we're left 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.

The final outcome is 8318.8311, with a leftover of 0.00053.