644024 ÷ 23 
Let's see how many times 23 fits into 644024.

Moving on to step 1:
The number 23 fits into 6 0 times, leaving a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 23

Going ahead to step 2:
When dividing 64 by 23, we get 2 with a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 46 away from 64, we end up with 18.
Fetch the next digit (4) from the dividend, attach it to 18 and continue: 184 / 23

Step 3:
The number 23 fits into 184 8 times, leaving a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 28.0
If we take 184 away from 184, we end up with 0.
Append the next digit (0) from the dividend to 0 and continue with: 0 / 23

Moving on to step 4:
0 divided by 23 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 280.0
Subtracting 0 from 0 leaves us with 0.
Fetch the next digit (2) from the dividend, attach it to 0 and continue: 2 / 23

Moving on to step 5:
23 goes into 2 0 times with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 2800.0
Subtracting 0 from 2 leaves us with 2.
Grab the next digit (4) from the dividend, add it to 2, then carry on: 24 / 23

Going ahead to step 6:
The number 23 fits into 24 1 times, leaving a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 28001.0
Subtract 23 from 24 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 7:
The number 23 fits into 10 0 times, leaving a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 28001.0
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 8:
If we divide 100 by 23, we get 4 and a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 28001.04
Subtracting 92 from 100 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 9:
When dividing 80 by 23, we get 3 with a remainder of 11.
Record the quotient 3 as the next digit in the result. 
Result so far: 28001.043
Deduct 69 from 80 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 10:
When dividing 110 by 23, we get 4 with a remainder of 18.
Write down 4 as next digit of the result. 
Result so far: 28001.0434
The remainder is 18 after subtracting 92 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 11:
23 can be fit into 180 7 times, resulting in a remainder of 19.
Use 7 as the next digit of our solution. 
Result so far: 28001.04347
If we subtract 161 from 180, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 12:
23 goes into 190 8 times with a remainder of 6.
Write down 8 as next digit of the result. 
Result so far: 28001.043478
The remainder is 6 after subtracting 184 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 13:
If we divide 60 by 23, we get 2 and a remainder of 14.
Write down 2 as next digit of the result. 
Result so far: 28001.0434782
Subtract 46 from 60 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 14:
23 can be fit into 140 6 times, resulting in a remainder of 2.
Use 6 as the next digit of our solution. 
Result so far: 28001.04347826
Deduct 138 from 140 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The quotient of the division is 28001.04347826, and the remainder is 2e-09.