We look at the division of 90728455 by 489 
Our goal is to divide 90728455 by 489.

Step 1:
489 can be fit into 9 0 times, resulting in a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 489

Let's proceed to step 2:
The number 489 fits into 90 0 times, leaving a remainder of 90.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 90 to get 90.
Grab the next digit (7) from the dividend, add it to 90, then carry on: 907 / 489

Step 3:
489 can be fit into 907 1 times, resulting in a remainder of 418.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 489 away from 907, we end up with 418.
Fetch the next digit (2) from the dividend, attach it to 418 and continue: 4182 / 489

Step 4:
When dividing 4182 by 489, we get 8 with a remainder of 270.
The next digit of our result is 8. 
Result so far: 18.0
The remainder is 270 after subtracting 3912 from 4182.
Include the next digit (8) from the dividend after 270, then repeat: 2708 / 489

Advancing to step 5:
The number 489 fits into 2708 5 times, leaving a remainder of 263.
Use 5 as the next digit of our solution. 
Result so far: 185.0
Subtract 2445 from 2708 to get 263.
Include the next digit (4) from the dividend after 263, then repeat: 2634 / 489

Moving on to step 6:
The number 489 fits into 2634 5 times, leaving a remainder of 189.
The number 5 becomes the next digit in our result. 
Result so far: 1855.0
Subtracting 2445 from 2634 leaves us with 189.
Grab the next digit (5) from the dividend, add it to 189, then carry on: 1895 / 489

Step 7:
489 goes into 1895 3 times with a remainder of 428.
The number 3 becomes the next digit in our result. 
Result so far: 18553.0
Deduct 1467 from 1895 and we're left with 428.
Include the next digit (5) from the dividend after 428, then repeat: 4285 / 489

Let's proceed to step 8:
The number 489 fits into 4285 8 times, leaving a remainder of 373.
Record the quotient 8 as the next digit in the result. 
Result so far: 185538.0
If we subtract 3912 from 4285, we get 373.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3730, and continue the process.

Let's proceed to step 9:
3730 divided by 489 is 7 with a remainder of 307.
Record the quotient 7 as the next digit in the result. 
Result so far: 185538.7
Deduct 3423 from 3730 and we're left with 307.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3070, and continue the process.

Let's proceed to step 10:
When dividing 3070 by 489, we get 6 with a remainder of 136.
Use 6 as the next digit of our solution. 
Result so far: 185538.76
Subtract 2934 from 3070 to get 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Let's proceed to step 11:
When dividing 1360 by 489, we get 2 with a remainder of 382.
The next digit of our result is 2. 
Result so far: 185538.762
Subtract 978 from 1360 to get 382.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3820, and continue the process.

Moving on to step 12:
When dividing 3820 by 489, we get 7 with a remainder of 397.
The next digit of our result is 7. 
Result so far: 185538.7627
Subtract 3423 from 3820 to get 397.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3970, and continue the process.

Step 13:
3970 divided by 489 is 8 with a remainder of 58.
The next digit of our result is 8. 
Result so far: 185538.76278
Subtracting 3912 from 3970 leaves us with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Step 14:
If we divide 580 by 489, we get 1 and a remainder of 91.
Write down 1 as next digit of the result. 
Result so far: 185538.762781
If we subtract 489 from 580, we get 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

On to step 15:
910 divided by 489 is 1 with a remainder of 421.
Put 1 as the next digit of the answer. 
Result so far: 185538.7627811
If we subtract 489 from 910, we get 421.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4210, and continue the process.

The final outcome is 185538.7627811, with a leftover of 4.21e-06.