We're dividing 99109090 by 605 
We want to figure out the number of times 99109090 can be divided by 605.

Let's proceed to step 1:
If we divide 9 by 605, we get 0 and a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Bring next digit (9) of the dividend behind the 9 and repeat the process: 99 / 605

Let's proceed to step 2:
If we divide 99 by 605, we get 0 and a remainder of 99.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 99 and we're left with 99.
Take the next digit (1) from the dividend and append it to 99, then repeat: 991 / 605

Going ahead to step 3:
The number 605 fits into 991 1 times, leaving a remainder of 386.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 605 from 991 and we're left with 386.
Include the next digit (0) from the dividend after 386, then repeat: 3860 / 605

Advancing to step 4:
The number 605 fits into 3860 6 times, leaving a remainder of 230.
Use 6 as the next digit of our solution. 
Result so far: 16.0
If we take 3630 away from 3860, we end up with 230.
Fetch the next digit (9) from the dividend, attach it to 230 and continue: 2309 / 605

Let's proceed to step 5:
605 goes into 2309 3 times with a remainder of 494.
Use 3 as the next digit of our solution. 
Result so far: 163.0
The remainder is 494 after subtracting 1815 from 2309.
Include the next digit (0) from the dividend after 494, then repeat: 4940 / 605

Moving on to step 6:
The number 605 fits into 4940 8 times, leaving a remainder of 100.
Put 8 as the next digit of the answer. 
Result so far: 1638.0
Subtract 4840 from 4940 to get 100.
Include the next digit (9) from the dividend after 100, then repeat: 1009 / 605

Advancing to step 7:
1009 divided by 605 is 1 with a remainder of 404.
The number 1 becomes the next digit in our result. 
Result so far: 16381.0
If we subtract 605 from 1009, we get 404.
Bring next digit (0) of the dividend behind the 404 and repeat the process: 4040 / 605

Advancing to step 8:
605 can be fit into 4040 6 times, resulting in a remainder of 410.
Record the quotient 6 as the next digit in the result. 
Result so far: 163816.0
Deduct 3630 from 4040 and we're left with 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4100, and continue the process.

Moving on to step 9:
605 goes into 4100 6 times with a remainder of 470.
Record the quotient 6 as the next digit in the result. 
Result so far: 163816.6
Subtract 3630 from 4100 to get 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4700, and continue the process.

Advancing to step 10:
605 can be fit into 4700 7 times, resulting in a remainder of 465.
Put 7 as the next digit of the answer. 
Result so far: 163816.67
Subtract 4235 from 4700 to get 465.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4650, and continue the process.

Moving on to step 11:
4650 divided by 605 is 7 with a remainder of 415.
Use 7 as the next digit of our solution. 
Result so far: 163816.677
If we take 4235 away from 4650, we end up with 415.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4150, and continue the process.

The final outcome is 163816.677, with a leftover of 0.0415.