28103805 ÷ 623 
We want to figure out the number of times 28103805 can be divided by 623.

Moving on to step 1:
623 goes into 2 0 times with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 623

On to step 2:
The number 623 fits into 28 0 times, leaving a remainder of 28.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 28, we get 28.
Bring next digit (1) of the dividend behind the 28 and repeat the process: 281 / 623

Step 3:
The number 623 fits into 281 0 times, leaving a remainder of 281.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 281 after subtracting 0 from 281.
Include the next digit (0) from the dividend after 281, then repeat: 2810 / 623

Moving on to step 4:
If we divide 2810 by 623, we get 4 and a remainder of 318.
The next digit of our result is 4. 
Result so far: 4.0
Subtract 2492 from 2810 to get 318.
Fetch the next digit (3) from the dividend, attach it to 318 and continue: 3183 / 623

Step 5:
The number 623 fits into 3183 5 times, leaving a remainder of 68.
Use 5 as the next digit of our solution. 
Result so far: 45.0
Subtracting 3115 from 3183 leaves us with 68.
Bring next digit (8) of the dividend behind the 68 and repeat the process: 688 / 623

Going ahead to step 6:
The number 623 fits into 688 1 times, leaving a remainder of 65.
Write down 1 as next digit of the result. 
Result so far: 451.0
If we subtract 623 from 688, we get 65.
Bring next digit (0) of the dividend behind the 65 and repeat the process: 650 / 623

Step 7:
When dividing 650 by 623, we get 1 with a remainder of 27.
Put 1 as the next digit of the answer. 
Result so far: 4511.0
If we subtract 623 from 650, we get 27.
Include the next digit (5) from the dividend after 27, then repeat: 275 / 623

On to step 8:
623 can be fit into 275 0 times, resulting in a remainder of 275.
Write down 0 as next digit of the result. 
Result so far: 45110.0
The remainder is 275 after subtracting 0 from 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

Advancing to step 9:
If we divide 2750 by 623, we get 4 and a remainder of 258.
Write down 4 as next digit of the result. 
Result so far: 45110.4
Subtract 2492 from 2750 to get 258.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

Moving on to step 10:
623 goes into 2580 4 times with a remainder of 88.
The next digit of our result is 4. 
Result so far: 45110.44
If we subtract 2492 from 2580, we get 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

The final outcome is 45110.44, with a leftover of 0.088.