We're dividing 12464416 by 644 
We're looking to find how many times 644 goes into 12464416.

On to step 1:
If we divide 1 by 644, we get 0 and a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 644

Going ahead to step 2:
The number 644 fits into 12 0 times, leaving a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 12 after subtracting 0 from 12.
Take the next digit (4) from the dividend and append it to 12, then repeat: 124 / 644

On to step 3:
When dividing 124 by 644, we get 0 with a remainder of 124.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 124 after subtracting 0 from 124.
Append the next digit (6) from the dividend to 124 and continue with: 1246 / 644

Let's proceed to step 4:
1246 divided by 644 is 1 with a remainder of 602.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 644 from 1246 to get 602.
Grab the next digit (4) from the dividend, add it to 602, then carry on: 6024 / 644

Advancing to step 5:
The number 644 fits into 6024 9 times, leaving a remainder of 228.
The number 9 becomes the next digit in our result. 
Result so far: 19.0
Deduct 5796 from 6024 and we're left with 228.
Append the next digit (4) from the dividend to 228 and continue with: 2284 / 644

Let's proceed to step 6:
When dividing 2284 by 644, we get 3 with a remainder of 352.
The next digit of our result is 3. 
Result so far: 193.0
If we take 1932 away from 2284, we end up with 352.
Take the next digit (1) from the dividend and append it to 352, then repeat: 3521 / 644

Step 7:
3521 divided by 644 is 5 with a remainder of 301.
Write down 5 as next digit of the result. 
Result so far: 1935.0
Subtract 3220 from 3521 to get 301.
Bring next digit (6) of the dividend behind the 301 and repeat the process: 3016 / 644

Advancing to step 8:
3016 divided by 644 is 4 with a remainder of 440.
Write down 4 as next digit of the result. 
Result so far: 19354.0
If we subtract 2576 from 3016, we get 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Let's proceed to step 9:
The number 644 fits into 4400 6 times, leaving a remainder of 536.
Put 6 as the next digit of the answer. 
Result so far: 19354.6
Subtracting 3864 from 4400 leaves us with 536.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5360, and continue the process.

Going ahead to step 10:
If we divide 5360 by 644, we get 8 and a remainder of 208.
Put 8 as the next digit of the answer. 
Result so far: 19354.68
Subtracting 5152 from 5360 leaves us with 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Moving on to step 11:
If we divide 2080 by 644, we get 3 and a remainder of 148.
Use 3 as the next digit of our solution. 
Result so far: 19354.683
Subtract 1932 from 2080 to get 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

Moving on to step 12:
When dividing 1480 by 644, we get 2 with a remainder of 192.
Write down 2 as next digit of the result. 
Result so far: 19354.6832
Subtract 1288 from 1480 to get 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

On to step 13:
The number 644 fits into 1920 2 times, leaving a remainder of 632.
The number 2 becomes the next digit in our result. 
Result so far: 19354.68322
If we subtract 1288 from 1920, we get 632.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6320, and continue the process.

The quotient of the division is 19354.68322, and the remainder is 0.000632.