We look at the division of 770250 by 90 
Let's see how many times 90 fits into 770250.

Advancing to step 1:
7 divided by 90 is 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Bring next digit (7) of the dividend behind the 7 and repeat the process: 77 / 90

Moving on to step 2:
90 can be fit into 77 0 times, resulting in a remainder of 77.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 77 after subtracting 0 from 77.
Take the next digit (0) from the dividend and append it to 77, then repeat: 770 / 90

Let's proceed to step 3:
When dividing 770 by 90, we get 8 with a remainder of 50.
Write down 8 as next digit of the result. 
Result so far: 8.0
Subtract 720 from 770 to get 50.
Fetch the next digit (2) from the dividend, attach it to 50 and continue: 502 / 90

Advancing to step 4:
The number 90 fits into 502 5 times, leaving a remainder of 52.
Put 5 as the next digit of the answer. 
Result so far: 85.0
Deduct 450 from 502 and we're left with 52.
Bring next digit (5) of the dividend behind the 52 and repeat the process: 525 / 90

On to step 5:
90 can be fit into 525 5 times, resulting in a remainder of 75.
Use 5 as the next digit of our solution. 
Result so far: 855.0
If we subtract 450 from 525, we get 75.
Take the next digit (0) from the dividend and append it to 75, then repeat: 750 / 90

Let's proceed to step 6:
750 divided by 90 is 8 with a remainder of 30.
Use 8 as the next digit of our solution. 
Result so far: 8558.0
Subtracting 720 from 750 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 7:
90 can be fit into 300 3 times, resulting in a remainder of 30.
Use 3 as the next digit of our solution. 
Result so far: 8558.3
Deduct 270 from 300 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 8:
When dividing 300 by 90, we get 3 with a remainder of 30.
Put 3 as the next digit of the answer. 
Result so far: 8558.33
Subtracting 270 from 300 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

The final outcome is 8558.33, with a leftover of 0.03.