We divide 39951925 by 644
Our goal is to divide 39951925 by 644.

Moving on to step 1:
644 can be fit into 3 0 times, resulting in a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 644

On to step 2:
When dividing 39 by 644, we get 0 with a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 39 after subtracting 0 from 39.
Fetch the next digit (9) from the dividend, attach it to 39 and continue: 399 / 644

Going ahead to step 3:
399 divided by 644 is 0 with a remainder of 399.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 399 and we're left with 399.
Take the next digit (5) from the dividend and append it to 399, then repeat: 3995 / 644

On to step 4:
644 goes into 3995 6 times with a remainder of 131.
The next digit of our result is 6. 
Result so far: 6.0
Subtracting 3864 from 3995 leaves us with 131.
Fetch the next digit (1) from the dividend, attach it to 131 and continue: 1311 / 644

Moving on to step 5:
644 can be fit into 1311 2 times, resulting in a remainder of 23.
The next digit of our result is 2. 
Result so far: 62.0
Subtract 1288 from 1311 to get 23.
Include the next digit (9) from the dividend after 23, then repeat: 239 / 644

Advancing to step 6:
If we divide 239 by 644, we get 0 and a remainder of 239.
Put 0 as the next digit of the answer. 
Result so far: 620.0
Deduct 0 from 239 and we're left with 239.
Fetch the next digit (2) from the dividend, attach it to 239 and continue: 2392 / 644

Going ahead to step 7:
2392 divided by 644 is 3 with a remainder of 460.
The number 3 becomes the next digit in our result. 
Result so far: 6203.0
The remainder is 460 after subtracting 1932 from 2392.
Fetch the next digit (5) from the dividend, attach it to 460 and continue: 4605 / 644

On to step 8:
When dividing 4605 by 644, we get 7 with a remainder of 97.
Use 7 as the next digit of our solution. 
Result so far: 62037.0
If we subtract 4508 from 4605, we get 97.
Since there are no more digits in the dividend, we add a zero to the remainder making it 970, and continue the process.

Going ahead to step 9:
970 divided by 644 is 1 with a remainder of 326.
Use 1 as the next digit of our solution. 
Result so far: 62037.1
Deduct 644 from 970 and we're left with 326.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3260, and continue the process.

Advancing to step 10:
If we divide 3260 by 644, we get 5 and a remainder of 40.
Write down 5 as next digit of the result. 
Result so far: 62037.15
Subtracting 3220 from 3260 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 11:
400 divided by 644 is 0 with a remainder of 400.
Write down 0 as next digit of the result. 
Result so far: 62037.15
If we subtract 0 from 400, we get 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Let's proceed to step 12:
644 goes into 4000 6 times with a remainder of 136.
The next digit of our result is 6. 
Result so far: 62037.1506
Subtract 3864 from 4000 to get 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Advancing to step 13:
644 can be fit into 1360 2 times, resulting in a remainder of 72.
Write down 2 as next digit of the result. 
Result so far: 62037.15062
Subtract 1288 from 1360 to get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Step 14:
If we divide 720 by 644, we get 1 and a remainder of 76.
Write down 1 as next digit of the result. 
Result so far: 62037.150621
The remainder is 76 after subtracting 644 from 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Step 15:
When dividing 760 by 644, we get 1 with a remainder of 116.
Use 1 as the next digit of our solution. 
Result so far: 62037.1506211
Subtract 644 from 760 to get 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

The final outcome is 62037.1506211, with a leftover of 1.16e-06.