6440990 ÷ 223 
Let's see how many times 223 fits into 6440990.

Advancing to step 1:
223 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 223

Advancing to step 2:
The number 223 fits into 64 0 times, leaving a remainder of 64.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 64 after subtracting 0 from 64.
Grab the next digit (4) from the dividend, add it to 64, then carry on: 644 / 223

Advancing to step 3:
644 divided by 223 is 2 with a remainder of 198.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Deduct 446 from 644 and we're left with 198.
Grab the next digit (0) from the dividend, add it to 198, then carry on: 1980 / 223

Let's proceed to step 4:
When dividing 1980 by 223, we get 8 with a remainder of 196.
Put 8 as the next digit of the answer. 
Result so far: 28.0
If we take 1784 away from 1980, we end up with 196.
Include the next digit (9) from the dividend after 196, then repeat: 1969 / 223

Moving on to step 5:
When dividing 1969 by 223, we get 8 with a remainder of 185.
Write down 8 as next digit of the result. 
Result so far: 288.0
Deduct 1784 from 1969 and we're left with 185.
Append the next digit (9) from the dividend to 185 and continue with: 1859 / 223

Going ahead to step 6:
When dividing 1859 by 223, we get 8 with a remainder of 75.
Record the quotient 8 as the next digit in the result. 
Result so far: 2888.0
Deduct 1784 from 1859 and we're left with 75.
Fetch the next digit (0) from the dividend, attach it to 75 and continue: 750 / 223

Advancing to step 7:
The number 223 fits into 750 3 times, leaving a remainder of 81.
Use 3 as the next digit of our solution. 
Result so far: 28883.0
If we subtract 669 from 750, we get 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Moving on to step 8:
When dividing 810 by 223, we get 3 with a remainder of 141.
Use 3 as the next digit of our solution. 
Result so far: 28883.3
Deduct 669 from 810 and we're left with 141.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1410, and continue the process.

Step 9:
223 can be fit into 1410 6 times, resulting in a remainder of 72.
Record the quotient 6 as the next digit in the result. 
Result so far: 28883.36
The remainder is 72 after subtracting 1338 from 1410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Going ahead to step 10:
223 can be fit into 720 3 times, resulting in a remainder of 51.
Put 3 as the next digit of the answer. 
Result so far: 28883.363
The remainder is 51 after subtracting 669 from 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Step 11:
223 can be fit into 510 2 times, resulting in a remainder of 64.
The number 2 becomes the next digit in our result. 
Result so far: 28883.3632
Deduct 446 from 510 and we're left with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Let's proceed to step 12:
The number 223 fits into 640 2 times, leaving a remainder of 194.
Use 2 as the next digit of our solution. 
Result so far: 28883.36322
Subtract 446 from 640 to get 194.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1940, and continue the process.

The final result is 28883.36322 with a remainder of 0.000194.