We divide 39569965 by 644
Our goal is to divide 39569965 by 644.

Step 1:
644 can be fit into 3 0 times, resulting in a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 644

Let's proceed to step 2:
644 goes into 39 0 times with a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 39 leaves us with 39.
Grab the next digit (5) from the dividend, add it to 39, then carry on: 395 / 644

Let's proceed to step 3:
If we divide 395 by 644, we get 0 and a remainder of 395.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 395, we get 395.
Fetch the next digit (6) from the dividend, attach it to 395 and continue: 3956 / 644

On to step 4:
3956 divided by 644 is 6 with a remainder of 92.
Put 6 as the next digit of the answer. 
Result so far: 6.0
The remainder is 92 after subtracting 3864 from 3956.
Append the next digit (9) from the dividend to 92 and continue with: 929 / 644

On to step 5:
644 goes into 929 1 times with a remainder of 285.
Write down 1 as next digit of the result. 
Result so far: 61.0
Subtract 644 from 929 to get 285.
Fetch the next digit (9) from the dividend, attach it to 285 and continue: 2859 / 644

Step 6:
The number 644 fits into 2859 4 times, leaving a remainder of 283.
Put 4 as the next digit of the answer. 
Result so far: 614.0
The remainder is 283 after subtracting 2576 from 2859.
Bring next digit (6) of the dividend behind the 283 and repeat the process: 2836 / 644

Step 7:
644 can be fit into 2836 4 times, resulting in a remainder of 260.
Use 4 as the next digit of our solution. 
Result so far: 6144.0
Deduct 2576 from 2836 and we're left with 260.
Bring next digit (5) of the dividend behind the 260 and repeat the process: 2605 / 644

Going ahead to step 8:
The number 644 fits into 2605 4 times, leaving a remainder of 29.
Record the quotient 4 as the next digit in the result. 
Result so far: 61444.0
Subtracting 2576 from 2605 leaves us 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.

Advancing to step 9:
If we divide 290 by 644, we get 0 and a remainder of 290.
Put 0 as the next digit of the answer. 
Result so far: 61444.0
Deduct 0 from 290 and we're left with 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Let's proceed to step 10:
2900 divided by 644 is 4 with a remainder of 324.
Use 4 as the next digit of our solution. 
Result so far: 61444.04
If we take 2576 away from 2900, we end up with 324.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3240, and continue the process.

Step 11:
When dividing 3240 by 644, we get 5 with a remainder of 20.
The number 5 becomes the next digit in our result. 
Result so far: 61444.045
If we subtract 3220 from 3240, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 12:
When dividing 200 by 644, we get 0 with a remainder of 200.
Record the quotient 0 as the next digit in the result. 
Result so far: 61444.045
Subtracting 0 from 200 leaves us with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Let's proceed to step 13:
When dividing 2000 by 644, we get 3 with a remainder of 68.
Write down 3 as next digit of the result. 
Result so far: 61444.04503
Subtract 1932 from 2000 to get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Advancing to step 14:
644 goes into 680 1 times with a remainder of 36.
Use 1 as the next digit of our solution. 
Result so far: 61444.045031
If we take 644 away from 680, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 15:
The number 644 fits into 360 0 times, leaving a remainder of 360.
Use 0 as the next digit of our solution. 
Result so far: 61444.045031
Deduct 0 from 360 and we're left with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Going ahead to step 16:
The number 644 fits into 3600 5 times, leaving a remainder of 380.
Record the quotient 5 as the next digit in the result. 
Result so far: 61444.04503105
If we subtract 3220 from 3600, we get 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

The final outcome is 61444.04503105, with a leftover of 3.8e-07.