91055251 ÷ 777 
Our goal is to divide 91055251 by 777.

Step 1:
9 divided by 777 is 0 with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Include the next digit (1) from the dividend after 9, then repeat: 91 / 777

Moving on to step 2:
When dividing 91 by 777, we get 0 with a remainder of 91.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 91, we end up with 91.
Grab the next digit (0) from the dividend, add it to 91, then carry on: 910 / 777

Going ahead to step 3:
The number 777 fits into 910 1 times, leaving a remainder of 133.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 777 from 910, we get 133.
Fetch the next digit (5) from the dividend, attach it to 133 and continue: 1335 / 777

Moving on to step 4:
777 goes into 1335 1 times with a remainder of 558.
The next digit of our result is 1. 
Result so far: 11.0
Deduct 777 from 1335 and we're left with 558.
Grab the next digit (5) from the dividend, add it to 558, then carry on: 5585 / 777

Going ahead to step 5:
777 goes into 5585 7 times with a remainder of 146.
The next digit of our result is 7. 
Result so far: 117.0
If we take 5439 away from 5585, we end up with 146.
Bring next digit (2) of the dividend behind the 146 and repeat the process: 1462 / 777

Step 6:
1462 divided by 777 is 1 with a remainder of 685.
Write down 1 as next digit of the result. 
Result so far: 1171.0
If we subtract 777 from 1462, we get 685.
Grab the next digit (5) from the dividend, add it to 685, then carry on: 6855 / 777

Going ahead to step 7:
6855 divided by 777 is 8 with a remainder of 639.
The next digit of our result is 8. 
Result so far: 11718.0
Deduct 6216 from 6855 and we're left with 639.
Bring next digit (1) of the dividend behind the 639 and repeat the process: 6391 / 777

On to step 8:
The number 777 fits into 6391 8 times, leaving a remainder of 175.
The number 8 becomes the next digit in our result. 
Result so far: 117188.0
Subtract 6216 from 6391 to get 175.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1750, and continue the process.

Let's proceed to step 9:
1750 divided by 777 is 2 with a remainder of 196.
The next digit of our result is 2. 
Result so far: 117188.2
Subtract 1554 from 1750 to get 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

Moving on to step 10:
1960 divided by 777 is 2 with a remainder of 406.
Put 2 as the next digit of the answer. 
Result so far: 117188.22
If we take 1554 away from 1960, we end up with 406.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4060, and continue the process.

The final result is 117188.22 with a remainder of 0.406.