12238390 divided by 669 
We want to divide 12238390 by 669.

Advancing to step 1:
669 goes into 1 0 times with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 669

Step 2:
The number 669 fits into 12 0 times, leaving a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Append the next digit (2) from the dividend to 12 and continue with: 122 / 669

On to step 3:
669 goes into 122 0 times with a remainder of 122.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 122 after subtracting 0 from 122.
Take the next digit (3) from the dividend and append it to 122, then repeat: 1223 / 669

Moving on to step 4:
The number 669 fits into 1223 1 times, leaving a remainder of 554.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 669 from 1223 leaves us with 554.
Grab the next digit (8) from the dividend, add it to 554, then carry on: 5548 / 669

Going ahead to step 5:
When dividing 5548 by 669, we get 8 with a remainder of 196.
Use 8 as the next digit of our solution. 
Result so far: 18.0
If we take 5352 away from 5548, we end up with 196.
Include the next digit (3) from the dividend after 196, then repeat: 1963 / 669

Step 6:
The number 669 fits into 1963 2 times, leaving a remainder of 625.
The next digit of our result is 2. 
Result so far: 182.0
Subtracting 1338 from 1963 leaves us with 625.
Grab the next digit (9) from the dividend, add it to 625, then carry on: 6259 / 669

Advancing to step 7:
6259 divided by 669 is 9 with a remainder of 238.
Write down 9 as next digit of the result. 
Result so far: 1829.0
Subtract 6021 from 6259 to get 238.
Take the next digit (0) from the dividend and append it to 238, then repeat: 2380 / 669

Going ahead to step 8:
If we divide 2380 by 669, we get 3 and a remainder of 373.
Put 3 as the next digit of the answer. 
Result so far: 18293.0
Deduct 2007 from 2380 and we're left with 373.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3730, and continue the process.

Step 9:
The number 669 fits into 3730 5 times, leaving a remainder of 385.
Write down 5 as next digit of the result. 
Result so far: 18293.5
If we subtract 3345 from 3730, we get 385.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3850, and continue the process.

On to step 10:
669 can be fit into 3850 5 times, resulting in a remainder of 505.
The next digit of our result is 5. 
Result so far: 18293.55
Deduct 3345 from 3850 and we're left with 505.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5050, and continue the process.

The quotient of the division is 18293.55, and the remainder is 0.505.