644408 divided by 89 
We're looking to find how many times 89 goes into 644408.

Going ahead to step 1:
6 divided by 89 is 0 with a remainder of 6.
Write down 0 as next digit of 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 / 89

Advancing to step 2:
89 goes into 64 0 times with a remainder of 64.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 64 leaves us with 64.
Append the next digit (4) from the dividend to 64 and continue with: 644 / 89

On to step 3:
89 can be fit into 644 7 times, resulting in a remainder of 21.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Subtracting 623 from 644 leaves us with 21.
Include the next digit (4) from the dividend after 21, then repeat: 214 / 89

Step 4:
89 goes into 214 2 times with a remainder of 36.
Write down 2 as next digit of the result. 
Result so far: 72.0
If we take 178 away from 214, we end up with 36.
Append the next digit (0) from the dividend to 36 and continue with: 360 / 89

Let's proceed to step 5:
89 can be fit into 360 4 times, resulting in a remainder of 4.
Put 4 as the next digit of the answer. 
Result so far: 724.0
Subtract 356 from 360 to get 4.
Include the next digit (8) from the dividend after 4, then repeat: 48 / 89

Going ahead to step 6:
48 divided by 89 is 0 with a remainder of 48.
Record the quotient 0 as the next digit in the result. 
Result so far: 7240.0
Deduct 0 from 48 and we're left with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Going ahead to step 7:
If we divide 480 by 89, we get 5 and a remainder of 35.
Record the quotient 5 as the next digit in the result. 
Result so far: 7240.5
Subtracting 445 from 480 leaves us with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Let's proceed to step 8:
350 divided by 89 is 3 with a remainder of 83.
The next digit of our result is 3. 
Result so far: 7240.53
Subtract 267 from 350 to get 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

Going ahead to step 9:
When dividing 830 by 89, we get 9 with a remainder of 29.
Use 9 as the next digit of our solution. 
Result so far: 7240.539
Deduct 801 from 830 and we're left with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Step 10:
The number 89 fits into 290 3 times, leaving a remainder of 23.
Record the quotient 3 as the next digit in the result. 
Result so far: 7240.5393
The remainder is 23 after subtracting 267 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Going ahead to step 11:
89 can be fit into 230 2 times, resulting in a remainder of 52.
The number 2 becomes the next digit in our result. 
Result so far: 7240.53932
If we take 178 away from 230, we end up with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Let's proceed to step 12:
If we divide 520 by 89, we get 5 and a remainder of 75.
Use 5 as the next digit of our solution. 
Result so far: 7240.539325
Deduct 445 from 520 and we're left with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Advancing to step 13:
The number 89 fits into 750 8 times, leaving a remainder of 38.
Record the quotient 8 as the next digit in the result. 
Result so far: 7240.5393258
If we take 712 away from 750, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 14:
380 divided by 89 is 4 with a remainder of 24.
Put 4 as the next digit of the answer. 
Result so far: 7240.53932584
Subtract 356 from 380 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

After the division, we end up with 7240.53932584 and a remainder of 2.4e-08.