77100861 divided by 990 
We want to divide 77100861 by 990.

Going ahead to step 1:
When dividing 7 by 990, we get 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 990

Going ahead to step 2:
The number 990 fits into 77 0 times, leaving a remainder of 77.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 77 and we're left with 77.
Include the next digit (1) from the dividend after 77, then repeat: 771 / 990

Step 3:
990 can be fit into 771 0 times, resulting in a remainder of 771.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 771 and we're left with 771.
Take the next digit (0) from the dividend and append it to 771, then repeat: 7710 / 990

On to step 4:
When dividing 7710 by 990, we get 7 with a remainder of 780.
Put 7 as the next digit of the answer. 
Result so far: 7.0
If we subtract 6930 from 7710, we get 780.
Take the next digit (0) from the dividend and append it to 780, then repeat: 7800 / 990

Advancing to step 5:
If we divide 7800 by 990, we get 7 and a remainder of 870.
Use 7 as the next digit of our solution. 
Result so far: 77.0
Subtract 6930 from 7800 to get 870.
Include the next digit (8) from the dividend after 870, then repeat: 8708 / 990

Advancing to step 6:
When dividing 8708 by 990, we get 8 with a remainder of 788.
Record the quotient 8 as the next digit in the result. 
Result so far: 778.0
Subtracting 7920 from 8708 leaves us with 788.
Bring next digit (6) of the dividend behind the 788 and repeat the process: 7886 / 990

Let's proceed to step 7:
7886 divided by 990 is 7 with a remainder of 956.
The next digit of our result is 7. 
Result so far: 7787.0
Subtracting 6930 from 7886 leaves us with 956.
Grab the next digit (1) from the dividend, add it to 956, then carry on: 9561 / 990

Advancing to step 8:
When dividing 9561 by 990, we get 9 with a remainder of 651.
Use 9 as the next digit of our solution. 
Result so far: 77879.0
If we subtract 8910 from 9561, we get 651.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6510, and continue the process.

Let's proceed to step 9:
990 can be fit into 6510 6 times, resulting in a remainder of 570.
The next digit of our result is 6. 
Result so far: 77879.6
If we subtract 5940 from 6510, we get 570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5700, and continue the process.

Step 10:
The number 990 fits into 5700 5 times, leaving a remainder of 750.
The next digit of our result is 5. 
Result so far: 77879.65
Subtracting 4950 from 5700 leaves us with 750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7500, and continue the process.

Advancing to step 11:
990 goes into 7500 7 times with a remainder of 570.
Record the quotient 7 as the next digit in the result. 
Result so far: 77879.657
Deduct 6930 from 7500 and we're left with 570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5700, and continue the process.

On to step 12:
The number 990 fits into 5700 5 times, leaving a remainder of 750.
Record the quotient 5 as the next digit in the result. 
Result so far: 77879.6575
Subtract 4950 from 5700 to get 750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7500, and continue the process.

Step 13:
The number 990 fits into 7500 7 times, leaving a remainder of 570.
Use 7 as the next digit of our solution. 
Result so far: 77879.65757
The remainder is 570 after subtracting 6930 from 7500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5700, and continue the process.

Moving on to step 14:
When dividing 5700 by 990, we get 5 with a remainder of 750.
The next digit of our result is 5. 
Result so far: 77879.657575
If we take 4950 away from 5700, we end up with 750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7500, and continue the process.

Let's proceed to step 15:
990 can be fit into 7500 7 times, resulting in a remainder of 570.
Write down 7 as next digit of the result. 
Result so far: 77879.6575757
The remainder is 570 after subtracting 6930 from 7500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5700, and continue the process.

Advancing to step 16:
990 can be fit into 5700 5 times, resulting in a remainder of 750.
The next digit of our result is 5. 
Result so far: 77879.65757575
Deduct 4950 from 5700 and we're left with 750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7500, and continue the process.

The final outcome is 77879.65757575, with a leftover of 7.5e-07.