17012355 ÷ 777 
Our goal is to divide 17012355 by 777.

On to step 1:
The number 777 fits into 1 0 times, leaving a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Fetch the next digit (7) from the dividend, attach it to 1 and continue: 17 / 777

On to step 2:
When dividing 17 by 777, we get 0 with a remainder of 17.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 17, we get 17.
Fetch the next digit (0) from the dividend, attach it to 17 and continue: 170 / 777

Let's proceed to step 3:
777 goes into 170 0 times with a remainder of 170.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 170 leaves us with 170.
Bring next digit (1) of the dividend behind the 170 and repeat the process: 1701 / 777

Moving on to step 4:
777 can be fit into 1701 2 times, resulting in a remainder of 147.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we take 1554 away from 1701, we end up with 147.
Include the next digit (2) from the dividend after 147, then repeat: 1472 / 777

On to step 5:
The number 777 fits into 1472 1 times, leaving a remainder of 695.
The number 1 becomes the next digit in our result. 
Result so far: 21.0
If we take 777 away from 1472, we end up with 695.
Append the next digit (3) from the dividend to 695 and continue with: 6953 / 777

Advancing to step 6:
6953 divided by 777 is 8 with a remainder of 737.
Use 8 as the next digit of our solution. 
Result so far: 218.0
Subtracting 6216 from 6953 leaves us with 737.
Grab the next digit (5) from the dividend, add it to 737, then carry on: 7375 / 777

Step 7:
777 can be fit into 7375 9 times, resulting in a remainder of 382.
Write down 9 as next digit of the result. 
Result so far: 2189.0
The remainder is 382 after subtracting 6993 from 7375.
Grab the next digit (5) from the dividend, add it to 382, then carry on: 3825 / 777

Step 8:
3825 divided by 777 is 4 with a remainder of 717.
The next digit of our result is 4. 
Result so far: 21894.0
The remainder is 717 after subtracting 3108 from 3825.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7170, and continue the process.

Going ahead to step 9:
7170 divided by 777 is 9 with a remainder of 177.
The next digit of our result is 9. 
Result so far: 21894.9
The remainder is 177 after subtracting 6993 from 7170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1770, and continue the process.

On to step 10:
777 goes into 1770 2 times with a remainder of 216.
The number 2 becomes the next digit in our result. 
Result so far: 21894.92
Deduct 1554 from 1770 and we're left with 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Moving on to step 11:
777 goes into 2160 2 times with a remainder of 606.
Write down 2 as next digit of the result. 
Result so far: 21894.922
If we subtract 1554 from 2160, we get 606.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6060, and continue the process.

After the division, we end up with 21894.922 and a remainder of 0.0606.