86412161 ÷ 778 
Our goal is to divide 86412161 by 778.

Let's proceed to step 1:
778 goes into 8 0 times with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 778

Advancing to step 2:
The number 778 fits into 86 0 times, leaving a remainder of 86.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 86, we get 86.
Bring next digit (4) of the dividend behind the 86 and repeat the process: 864 / 778

Step 3:
The number 778 fits into 864 1 times, leaving a remainder of 86.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 86 after subtracting 778 from 864.
Include the next digit (1) from the dividend after 86, then repeat: 861 / 778

Step 4:
778 can be fit into 861 1 times, resulting in a remainder of 83.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
Subtract 778 from 861 to get 83.
Include the next digit (2) from the dividend after 83, then repeat: 832 / 778

Step 5:
778 goes into 832 1 times with a remainder of 54.
Record the quotient 1 as the next digit in the result. 
Result so far: 111.0
If we subtract 778 from 832, we get 54.
Fetch the next digit (1) from the dividend, attach it to 54 and continue: 541 / 778

Going ahead to step 6:
778 goes into 541 0 times with a remainder of 541.
Use 0 as the next digit of our solution. 
Result so far: 1110.0
If we take 0 away from 541, we end up with 541.
Grab the next digit (6) from the dividend, add it to 541, then carry on: 5416 / 778

On to step 7:
778 can be fit into 5416 6 times, resulting in a remainder of 748.
The number 6 becomes the next digit in our result. 
Result so far: 11106.0
If we take 4668 away from 5416, we end up with 748.
Append the next digit (1) from the dividend to 748 and continue with: 7481 / 778

On to step 8:
778 can be fit into 7481 9 times, resulting in a remainder of 479.
Write down 9 as next digit of the result. 
Result so far: 111069.0
The remainder is 479 after subtracting 7002 from 7481.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4790, and continue the process.

Going ahead to step 9:
The number 778 fits into 4790 6 times, leaving a remainder of 122.
Put 6 as the next digit of the answer. 
Result so far: 111069.6
Deduct 4668 from 4790 and we're left with 122.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

Going ahead to step 10:
When dividing 1220 by 778, we get 1 with a remainder of 442.
Use 1 as the next digit of our solution. 
Result so far: 111069.61
If we subtract 778 from 1220, we get 442.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4420, and continue the process.

On to step 11:
778 goes into 4420 5 times with a remainder of 530.
Write down 5 as next digit of the result. 
Result so far: 111069.615
Subtract 3890 from 4420 to get 530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5300, and continue the process.

Moving on to step 12:
The number 778 fits into 5300 6 times, leaving a remainder of 632.
Write down 6 as next digit of the result. 
Result so far: 111069.6156
The remainder is 632 after subtracting 4668 from 5300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6320, and continue the process.

Going ahead to step 13:
6320 divided by 778 is 8 with a remainder of 96.
The next digit of our result is 8. 
Result so far: 111069.61568
Subtract 6224 from 6320 to get 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

On to step 14:
If we divide 960 by 778, we get 1 and a remainder of 182.
Write down 1 as next digit of the result. 
Result so far: 111069.615681
Subtracting 778 from 960 leaves us with 182.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

On to step 15:
778 goes into 1820 2 times with a remainder of 264.
The next digit of our result is 2. 
Result so far: 111069.6156812
Subtract 1556 from 1820 to get 264.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

Step 16:
If we divide 2640 by 778, we get 3 and a remainder of 306.
Put 3 as the next digit of the answer. 
Result so far: 111069.61568123
If we subtract 2334 from 2640, we get 306.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3060, and continue the process.

After the division, we end up with 111069.61568123 and a remainder of 3.06e-07.