We divide 669521 by 77
Let's see how many times 77 fits into 669521.

Let's proceed to step 1:
When dividing 6 by 77, we get 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 77

Advancing to step 2:
If we divide 66 by 77, we get 0 and a remainder of 66.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 66, we get 66.
Bring next digit (9) of the dividend behind the 66 and repeat the process: 669 / 77

Let's proceed to step 3:
77 goes into 669 8 times with a remainder of 53.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Subtracting 616 from 669 leaves us with 53.
Bring next digit (5) of the dividend behind the 53 and repeat the process: 535 / 77

Going ahead to step 4:
When dividing 535 by 77, we get 6 with a remainder of 73.
The next digit of our result is 6. 
Result so far: 86.0
If we subtract 462 from 535, we get 73.
Bring next digit (2) of the dividend behind the 73 and repeat the process: 732 / 77

Let's proceed to step 5:
77 can be fit into 732 9 times, resulting in a remainder of 39.
The next digit of our result is 9. 
Result so far: 869.0
If we take 693 away from 732, we end up with 39.
Include the next digit (1) from the dividend after 39, then repeat: 391 / 77

Moving on to step 6:
If we divide 391 by 77, we get 5 and a remainder of 6.
Write down 5 as next digit of the result. 
Result so far: 8695.0
Subtracting 385 from 391 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 7:
When dividing 60 by 77, we get 0 with a remainder of 60.
Use 0 as the next digit of our solution. 
Result so far: 8695.0
If we subtract 0 from 60, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 8:
The number 77 fits into 600 7 times, leaving a remainder of 61.
Put 7 as the next digit of the answer. 
Result so far: 8695.07
Deduct 539 from 600 and we're left with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Advancing to step 9:
610 divided by 77 is 7 with a remainder of 71.
Use 7 as the next digit of our solution. 
Result so far: 8695.077
The remainder is 71 after subtracting 539 from 610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

In conclusion, the division gives 8695.077 with a balance of 0.0071.