39188605 ÷ 990 
We want to figure out the number of times 39188605 can be divided by 990.

Advancing to step 1:
The number 990 fits into 3 0 times, leaving a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 990

Going ahead to step 2:
When dividing 39 by 990, we get 0 with a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 39 to get 39.
Include the next digit (1) from the dividend after 39, then repeat: 391 / 990

Moving on to step 3:
The number 990 fits into 391 0 times, leaving a remainder of 391.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 391, we end up with 391.
Fetch the next digit (8) from the dividend, attach it to 391 and continue: 3918 / 990

Going ahead to step 4:
3918 divided by 990 is 3 with a remainder of 948.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
The remainder is 948 after subtracting 2970 from 3918.
Fetch the next digit (8) from the dividend, attach it to 948 and continue: 9488 / 990

Going ahead to step 5:
9488 divided by 990 is 9 with a remainder of 578.
Use 9 as the next digit of our solution. 
Result so far: 39.0
Deduct 8910 from 9488 and we're left with 578.
Fetch the next digit (6) from the dividend, attach it to 578 and continue: 5786 / 990

Step 6:
The number 990 fits into 5786 5 times, leaving a remainder of 836.
Put 5 as the next digit of the answer. 
Result so far: 395.0
If we take 4950 away from 5786, we end up with 836.
Include the next digit (0) from the dividend after 836, then repeat: 8360 / 990

Moving on to step 7:
8360 divided by 990 is 8 with a remainder of 440.
Record the quotient 8 as the next digit in the result. 
Result so far: 3958.0
Deduct 7920 from 8360 and we're left with 440.
Take the next digit (5) from the dividend and append it to 440, then repeat: 4405 / 990

Advancing to step 8:
990 can be fit into 4405 4 times, resulting in a remainder of 445.
The next digit of our result is 4. 
Result so far: 39584.0
If we subtract 3960 from 4405, we get 445.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4450, and continue the process.

Moving on to step 9:
4450 divided by 990 is 4 with a remainder of 490.
The number 4 becomes the next digit in our result. 
Result so far: 39584.4
The remainder is 490 after subtracting 3960 from 4450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4900, and continue the process.

Let's proceed to step 10:
The number 990 fits into 4900 4 times, leaving a remainder of 940.
Record the quotient 4 as the next digit in the result. 
Result so far: 39584.44
Deduct 3960 from 4900 and we're left with 940.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9400, and continue the process.

The final result is 39584.44 with a remainder of 0.94.