We look at the division of 863983 by 77 
We're looking to find how many times 77 goes into 863983.

Step 1:
If we divide 8 by 77, we get 0 and a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 77

Moving on to step 2:
86 divided by 77 is 1 with a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 9 after subtracting 77 from 86.
Fetch the next digit (3) from the dividend, attach it to 9 and continue: 93 / 77

Moving on to step 3:
The number 77 fits into 93 1 times, leaving a remainder of 16.
Put 1 as the next digit of the answer. 
Result so far: 11.0
If we subtract 77 from 93, we get 16.
Grab the next digit (9) from the dividend, add it to 16, then carry on: 169 / 77

Going ahead to step 4:
169 divided by 77 is 2 with a remainder of 15.
Write down 2 as next digit of the result. 
Result so far: 112.0
Subtracting 154 from 169 leaves us with 15.
Bring next digit (8) of the dividend behind the 15 and repeat the process: 158 / 77

Advancing to step 5:
158 divided by 77 is 2 with a remainder of 4.
The next digit of our result is 2. 
Result so far: 1122.0
Subtracting 154 from 158 leaves us with 4.
Bring next digit (3) of the dividend behind the 4 and repeat the process: 43 / 77

Going ahead to step 6:
77 can be fit into 43 0 times, resulting in a remainder of 43.
Write down 0 as next digit of the result. 
Result so far: 11220.0
Subtract 0 from 43 to get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Step 7:
If we divide 430 by 77, we get 5 and a remainder of 45.
The next digit of our result is 5. 
Result so far: 11220.5
If we take 385 away from 430, we end up with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Going ahead to step 8:
When dividing 450 by 77, we get 5 with a remainder of 65.
The number 5 becomes the next digit in our result. 
Result so far: 11220.55
The remainder is 65 after subtracting 385 from 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

After the division, we end up with 11220.55 and a remainder of 0.065.