We're dividing 78999961 by 86 
Our goal is to divide 78999961 by 86.

On to step 1:
86 goes into 7 0 times with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 86

Step 2:
86 goes into 78 0 times with a remainder of 78.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 78 to get 78.
Include the next digit (9) from the dividend after 78, then repeat: 789 / 86

On to step 3:
The number 86 fits into 789 9 times, leaving a remainder of 15.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Subtracting 774 from 789 leaves us with 15.
Fetch the next digit (9) from the dividend, attach it to 15 and continue: 159 / 86

Advancing to step 4:
If we divide 159 by 86, we get 1 and a remainder of 73.
Record the quotient 1 as the next digit in the result. 
Result so far: 91.0
Subtracting 86 from 159 leaves us with 73.
Fetch the next digit (9) from the dividend, attach it to 73 and continue: 739 / 86

Advancing to step 5:
The number 86 fits into 739 8 times, leaving a remainder of 51.
Put 8 as the next digit of the answer. 
Result so far: 918.0
The remainder is 51 after subtracting 688 from 739.
Grab the next digit (9) from the dividend, add it to 51, then carry on: 519 / 86

On to step 6:
The number 86 fits into 519 6 times, leaving a remainder of 3.
The next digit of our result is 6. 
Result so far: 9186.0
Subtract 516 from 519 to get 3.
Append the next digit (6) from the dividend to 3 and continue with: 36 / 86

Going ahead to step 7:
86 goes into 36 0 times with a remainder of 36.
The number 0 becomes the next digit in our result. 
Result so far: 91860.0
The remainder is 36 after subtracting 0 from 36.
Take the next digit (1) from the dividend and append it to 36, then repeat: 361 / 86

Step 8:
361 divided by 86 is 4 with a remainder of 17.
Use 4 as the next digit of our solution. 
Result so far: 918604.0
If we take 344 away from 361, we end up with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 9:
When dividing 170 by 86, we get 1 with a remainder of 84.
Record the quotient 1 as the next digit in the result. 
Result so far: 918604.1
Subtract 86 from 170 to get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Moving on to step 10:
When dividing 840 by 86, we get 9 with a remainder of 66.
The next digit of our result is 9. 
Result so far: 918604.19
If we take 774 away from 840, we end up with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

On to step 11:
86 can be fit into 660 7 times, resulting in a remainder of 58.
Use 7 as the next digit of our solution. 
Result so far: 918604.197
If we subtract 602 from 660, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 12:
The number 86 fits into 580 6 times, leaving a remainder of 64.
The next digit of our result is 6. 
Result so far: 918604.1976
Subtracting 516 from 580 leaves us with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 13:
86 can be fit into 640 7 times, resulting in a remainder of 38.
Put 7 as the next digit of the answer. 
Result so far: 918604.19767
The remainder is 38 after subtracting 602 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 14:
86 can be fit into 380 4 times, resulting in a remainder of 36.
Put 4 as the next digit of the answer. 
Result so far: 918604.197674
The remainder is 36 after subtracting 344 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 15:
If we divide 360 by 86, we get 4 and a remainder of 16.
The next digit of our result is 4. 
Result so far: 918604.1976744
If we subtract 344 from 360, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The final outcome is 918604.1976744, with a leftover of 1.6e-07.