We look at the division of 86394821 by 763 
We're looking to find how many times 763 goes into 86394821.

Step 1:
If we divide 8 by 763, we get 0 and a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 763

Let's proceed to step 2:
86 divided by 763 is 0 with a remainder of 86.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 86 after subtracting 0 from 86.
Include the next digit (3) from the dividend after 86, then repeat: 863 / 763

Moving on to step 3:
When dividing 863 by 763, we get 1 with a remainder of 100.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 763 from 863 and we're left with 100.
Include the next digit (9) from the dividend after 100, then repeat: 1009 / 763

Advancing to step 4:
If we divide 1009 by 763, we get 1 and a remainder of 246.
Use 1 as the next digit of our solution. 
Result so far: 11.0
Subtract 763 from 1009 to get 246.
Grab the next digit (4) from the dividend, add it to 246, then carry on: 2464 / 763

Advancing to step 5:
763 can be fit into 2464 3 times, resulting in a remainder of 175.
Write down 3 as next digit of the result. 
Result so far: 113.0
Deduct 2289 from 2464 and we're left with 175.
Bring next digit (8) of the dividend behind the 175 and repeat the process: 1758 / 763

Moving on to step 6:
763 goes into 1758 2 times with a remainder of 232.
Use 2 as the next digit of our solution. 
Result so far: 1132.0
If we subtract 1526 from 1758, we get 232.
Include the next digit (2) from the dividend after 232, then repeat: 2322 / 763

On to step 7:
When dividing 2322 by 763, we get 3 with a remainder of 33.
Record the quotient 3 as the next digit in the result. 
Result so far: 11323.0
Deduct 2289 from 2322 and we're left with 33.
Take the next digit (1) from the dividend and append it to 33, then repeat: 331 / 763

Step 8:
If we divide 331 by 763, we get 0 and a remainder of 331.
Write down 0 as next digit of the result. 
Result so far: 113230.0
Subtract 0 from 331 to get 331.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3310, and continue the process.

Step 9:
When dividing 3310 by 763, we get 4 with a remainder of 258.
The number 4 becomes the next digit in our result. 
Result so far: 113230.4
The remainder is 258 after subtracting 3052 from 3310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

Let's proceed to step 10:
763 goes into 2580 3 times with a remainder of 291.
Write down 3 as next digit of the result. 
Result so far: 113230.43
The remainder is 291 after subtracting 2289 from 2580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2910, and continue the process.

Going ahead to step 11:
The number 763 fits into 2910 3 times, leaving a remainder of 621.
The number 3 becomes the next digit in our result. 
Result so far: 113230.433
Subtracting 2289 from 2910 leaves us with 621.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6210, and continue the process.

The final outcome is 113230.433, with a leftover of 0.0621.