We look at the division of 766039 by 90 
Our goal is to divide 766039 by 90.

Step 1:
90 can be fit into 7 0 times, resulting in a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Bring next digit (6) of the dividend behind the 7 and repeat the process: 76 / 90

On to step 2:
90 can be fit into 76 0 times, resulting in a remainder of 76.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 76 leaves us with 76.
Take the next digit (6) from the dividend and append it to 76, then repeat: 766 / 90

Step 3:
90 goes into 766 8 times with a remainder of 46.
The next digit of our result is 8. 
Result so far: 8.0
The remainder is 46 after subtracting 720 from 766.
Take the next digit (0) from the dividend and append it to 46, then repeat: 460 / 90

Advancing to step 4:
460 divided by 90 is 5 with a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 85.0
If we subtract 450 from 460, we get 10.
Take the next digit (3) from the dividend and append it to 10, then repeat: 103 / 90

Let's proceed to step 5:
The number 90 fits into 103 1 times, leaving a remainder of 13.
The next digit of our result is 1. 
Result so far: 851.0
Deduct 90 from 103 and we're left with 13.
Grab the next digit (9) from the dividend, add it to 13, then carry on: 139 / 90

Step 6:
When dividing 139 by 90, we get 1 with a remainder of 49.
Write down 1 as next digit of the result. 
Result so far: 8511.0
Deduct 90 from 139 and we're left with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Let's proceed to step 7:
90 can be fit into 490 5 times, resulting in a remainder of 40.
The number 5 becomes the next digit in our result. 
Result so far: 8511.5
Subtract 450 from 490 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 8:
400 divided by 90 is 4 with a remainder of 40.
Write down 4 as next digit of the result. 
Result so far: 8511.54
Subtract 360 from 400 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 9:
400 divided by 90 is 4 with a remainder of 40.
Record the quotient 4 as the next digit in the result. 
Result so far: 8511.544
Subtract 360 from 400 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

The final outcome is 8511.544, with a leftover of 0.004.