28117638 ÷ 909 
We want to figure out the number of times 28117638 can be divided by 909.

Moving on to step 1:
If we divide 2 by 909, we get 0 and a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 909

Advancing to step 2:
When dividing 28 by 909, we get 0 with a remainder of 28.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 28 leaves us with 28.
Grab the next digit (1) from the dividend, add it to 28, then carry on: 281 / 909

Step 3:
When dividing 281 by 909, we get 0 with a remainder of 281.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 281, we get 281.
Take the next digit (1) from the dividend and append it to 281, then repeat: 2811 / 909

On to step 4:
The number 909 fits into 2811 3 times, leaving a remainder of 84.
The next digit of our result is 3. 
Result so far: 3.0
The remainder is 84 after subtracting 2727 from 2811.
Bring next digit (7) of the dividend behind the 84 and repeat the process: 847 / 909

Moving on to step 5:
847 divided by 909 is 0 with a remainder of 847.
The next digit of our result is 0. 
Result so far: 30.0
Deduct 0 from 847 and we're left with 847.
Fetch the next digit (6) from the dividend, attach it to 847 and continue: 8476 / 909

Step 6:
The number 909 fits into 8476 9 times, leaving a remainder of 295.
Put 9 as the next digit of the answer. 
Result so far: 309.0
The remainder is 295 after subtracting 8181 from 8476.
Fetch the next digit (3) from the dividend, attach it to 295 and continue: 2953 / 909

Advancing to step 7:
909 can be fit into 2953 3 times, resulting in a remainder of 226.
The number 3 becomes the next digit in our result. 
Result so far: 3093.0
Subtract 2727 from 2953 to get 226.
Include the next digit (8) from the dividend after 226, then repeat: 2268 / 909

Advancing to step 8:
909 goes into 2268 2 times with a remainder of 450.
Record the quotient 2 as the next digit in the result. 
Result so far: 30932.0
The remainder is 450 after subtracting 1818 from 2268.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

Moving on to step 9:
909 can be fit into 4500 4 times, resulting in a remainder of 864.
Put 4 as the next digit of the answer. 
Result so far: 30932.4
If we subtract 3636 from 4500, we get 864.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8640, and continue the process.

Going ahead to step 10:
When dividing 8640 by 909, we get 9 with a remainder of 459.
The number 9 becomes the next digit in our result. 
Result so far: 30932.49
If we take 8181 away from 8640, we end up with 459.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4590, and continue the process.

Moving on to step 11:
When dividing 4590 by 909, we get 5 with a remainder of 45.
Write down 5 as next digit of the result. 
Result so far: 30932.495
Subtract 4545 from 4590 to get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Advancing to step 12:
The number 909 fits into 450 0 times, leaving a remainder of 450.
The next digit of our result is 0. 
Result so far: 30932.495
Subtract 0 from 450 to get 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

Let's proceed to step 13:
When dividing 4500 by 909, we get 4 with a remainder of 864.
Put 4 as the next digit of the answer. 
Result so far: 30932.49504
Subtracting 3636 from 4500 leaves us with 864.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8640, and continue the process.

Let's proceed to step 14:
909 can be fit into 8640 9 times, resulting in a remainder of 459.
Use 9 as the next digit of our solution. 
Result so far: 30932.495049
Subtract 8181 from 8640 to get 459.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4590, and continue the process.

Going ahead to step 15:
4590 divided by 909 is 5 with a remainder of 45.
Put 5 as the next digit of the answer. 
Result so far: 30932.4950495
If we subtract 4545 from 4590, we get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

On to step 16:
If we divide 450 by 909, we get 0 and a remainder of 450.
The number 0 becomes the next digit in our result. 
Result so far: 30932.4950495
The remainder is 450 after subtracting 0 from 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

The final outcome is 30932.4950495, with a leftover of 4.5e-07.