663792 ÷ 86 
We want to figure out the number of times 663792 can be divided by 86.

Step 1:
86 goes into 6 0 times with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 86

On to step 2:
The number 86 fits into 66 0 times, leaving a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 66 leaves us with 66.
Bring next digit (3) of the dividend behind the 66 and repeat the process: 663 / 86

Step 3:
If we divide 663 by 86, we get 7 and a remainder of 61.
Write down 7 as next digit of the result. 
Result so far: 7.0
Subtracting 602 from 663 leaves us with 61.
Append the next digit (7) from the dividend to 61 and continue with: 617 / 86

On to step 4:
86 can be fit into 617 7 times, resulting in a remainder of 15.
The number 7 becomes the next digit in our result. 
Result so far: 77.0
If we subtract 602 from 617, we get 15.
Append the next digit (9) from the dividend to 15 and continue with: 159 / 86

Let's proceed to step 5:
159 divided by 86 is 1 with a remainder of 73.
Put 1 as the next digit of the answer. 
Result so far: 771.0
Deduct 86 from 159 and we're left with 73.
Include the next digit (2) from the dividend after 73, then repeat: 732 / 86

Moving on to step 6:
The number 86 fits into 732 8 times, leaving a remainder of 44.
Put 8 as the next digit of the answer. 
Result so far: 7718.0
Deduct 688 from 732 and we're left with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 7:
If we divide 440 by 86, we get 5 and a remainder of 10.
The next digit of our result is 5. 
Result so far: 7718.5
Deduct 430 from 440 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 8:
86 can be fit into 100 1 times, resulting in a remainder of 14.
Record the quotient 1 as the next digit in the result. 
Result so far: 7718.51
The remainder is 14 after subtracting 86 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 9:
86 goes into 140 1 times with a remainder of 54.
Write down 1 as next digit of the result. 
Result so far: 7718.511
The remainder is 54 after subtracting 86 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

The final outcome is 7718.511, with a leftover of 0.0054.