We're dividing 16323219 by 644 
We're looking to find how many times 644 goes into 16323219.

On to step 1:
The number 644 fits into 1 0 times, leaving a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Grab the next digit (6) from the dividend, add it to 1, then carry on: 16 / 644

Let's proceed to step 2:
The number 644 fits into 16 0 times, leaving a remainder of 16.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 16 leaves us with 16.
Bring next digit (3) of the dividend behind the 16 and repeat the process: 163 / 644

Advancing to step 3:
163 divided by 644 is 0 with a remainder of 163.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 163 and we're left with 163.
Append the next digit (2) from the dividend to 163 and continue with: 1632 / 644

Going ahead to step 4:
When dividing 1632 by 644, we get 2 with a remainder of 344.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtract 1288 from 1632 to get 344.
Include the next digit (3) from the dividend after 344, then repeat: 3443 / 644

Going ahead to step 5:
If we divide 3443 by 644, we get 5 and a remainder of 223.
The number 5 becomes the next digit in our result. 
Result so far: 25.0
Deduct 3220 from 3443 and we're left with 223.
Bring next digit (2) of the dividend behind the 223 and repeat the process: 2232 / 644

Step 6:
644 can be fit into 2232 3 times, resulting in a remainder of 300.
Use 3 as the next digit of our solution. 
Result so far: 253.0
If we take 1932 away from 2232, we end up with 300.
Grab the next digit (1) from the dividend, add it to 300, then carry on: 3001 / 644

Step 7:
644 can be fit into 3001 4 times, resulting in a remainder of 425.
Put 4 as the next digit of the answer. 
Result so far: 2534.0
If we take 2576 away from 3001, we end up with 425.
Grab the next digit (9) from the dividend, add it to 425, then carry on: 4259 / 644

Moving on to step 8:
If we divide 4259 by 644, we get 6 and a remainder of 395.
Record the quotient 6 as the next digit in the result. 
Result so far: 25346.0
Deduct 3864 from 4259 and we're left with 395.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3950, and continue the process.

Moving on to step 9:
If we divide 3950 by 644, we get 6 and a remainder of 86.
Record the quotient 6 as the next digit in the result. 
Result so far: 25346.6
If we take 3864 away from 3950, we end up with 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Advancing to step 10:
860 divided by 644 is 1 with a remainder of 216.
Use 1 as the next digit of our solution. 
Result so far: 25346.61
Subtract 644 from 860 to get 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Step 11:
The number 644 fits into 2160 3 times, leaving a remainder of 228.
Record the quotient 3 as the next digit in the result. 
Result so far: 25346.613
Subtract 1932 from 2160 to get 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Going ahead to step 12:
644 goes into 2280 3 times with a remainder of 348.
Record the quotient 3 as the next digit in the result. 
Result so far: 25346.6133
If we subtract 1932 from 2280, we get 348.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3480, and continue the process.

The final result is 25346.6133 with a remainder of 0.00348.