We look at the division of 90409946 by 669 
We're looking to find how many times 669 goes into 90409946.

Step 1:
If we divide 9 by 669, we get 0 and a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 669

On to step 2:
669 can be fit into 90 0 times, resulting in a remainder of 90.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 90, we get 90.
Include the next digit (4) from the dividend after 90, then repeat: 904 / 669

Advancing to step 3:
If we divide 904 by 669, we get 1 and a remainder of 235.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 669 from 904 and we're left with 235.
Take the next digit (0) from the dividend and append it to 235, then repeat: 2350 / 669

On to step 4:
The number 669 fits into 2350 3 times, leaving a remainder of 343.
The next digit of our result is 3. 
Result so far: 13.0
Subtracting 2007 from 2350 leaves us with 343.
Include the next digit (9) from the dividend after 343, then repeat: 3439 / 669

On to step 5:
3439 divided by 669 is 5 with a remainder of 94.
Write down 5 as next digit of the result. 
Result so far: 135.0
The remainder is 94 after subtracting 3345 from 3439.
Fetch the next digit (9) from the dividend, attach it to 94 and continue: 949 / 669

Moving on to step 6:
669 can be fit into 949 1 times, resulting in a remainder of 280.
Use 1 as the next digit of our solution. 
Result so far: 1351.0
Subtract 669 from 949 to get 280.
Bring next digit (4) of the dividend behind the 280 and repeat the process: 2804 / 669

Step 7:
The number 669 fits into 2804 4 times, leaving a remainder of 128.
The number 4 becomes the next digit in our result. 
Result so far: 13514.0
Subtract 2676 from 2804 to get 128.
Bring next digit (6) of the dividend behind the 128 and repeat the process: 1286 / 669

Going ahead to step 8:
1286 divided by 669 is 1 with a remainder of 617.
Put 1 as the next digit of the answer. 
Result so far: 135141.0
Deduct 669 from 1286 and we're left with 617.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6170, and continue the process.

Advancing to step 9:
The number 669 fits into 6170 9 times, leaving a remainder of 149.
The number 9 becomes the next digit in our result. 
Result so far: 135141.9
If we take 6021 away from 6170, we end up with 149.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1490, and continue the process.

Advancing to step 10:
669 goes into 1490 2 times with a remainder of 152.
Write down 2 as next digit of the result. 
Result so far: 135141.92
If we subtract 1338 from 1490, we get 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

Step 11:
If we divide 1520 by 669, we get 2 and a remainder of 182.
Put 2 as the next digit of the answer. 
Result so far: 135141.922
Subtract 1338 from 1520 to get 182.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

The final outcome is 135141.922, with a leftover of 0.0182.