39772083 divided by 644 
We're looking to find how many times 644 goes into 39772083.

Going ahead to step 1:
When dividing 3 by 644, we get 0 with a remainder of 3.
Record the quotient 0 as the next digit in 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

Advancing to step 2:
If we divide 39 by 644, we get 0 and a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 39 and we're left with 39.
Append the next digit (7) from the dividend to 39 and continue with: 397 / 644

Moving on to step 3:
When dividing 397 by 644, we get 0 with a remainder of 397.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 397, we end up with 397.
Include the next digit (7) from the dividend after 397, then repeat: 3977 / 644

Step 4:
When dividing 3977 by 644, we get 6 with a remainder of 113.
Write down 6 as next digit of the result. 
Result so far: 6.0
The remainder is 113 after subtracting 3864 from 3977.
Bring next digit (2) of the dividend behind the 113 and repeat the process: 1132 / 644

On to step 5:
644 can be fit into 1132 1 times, resulting in a remainder of 488.
Write down 1 as next digit of the result. 
Result so far: 61.0
The remainder is 488 after subtracting 644 from 1132.
Take the next digit (0) from the dividend and append it to 488, then repeat: 4880 / 644

Advancing to step 6:
4880 divided by 644 is 7 with a remainder of 372.
Use 7 as the next digit of our solution. 
Result so far: 617.0
Subtract 4508 from 4880 to get 372.
Grab the next digit (8) from the dividend, add it to 372, then carry on: 3728 / 644

On to step 7:
If we divide 3728 by 644, we get 5 and a remainder of 508.
Use 5 as the next digit of our solution. 
Result so far: 6175.0
Deduct 3220 from 3728 and we're left with 508.
Take the next digit (3) from the dividend and append it to 508, then repeat: 5083 / 644

Moving on to step 8:
5083 divided by 644 is 7 with a remainder of 575.
Put 7 as the next digit of the answer. 
Result so far: 61757.0
If we subtract 4508 from 5083, we get 575.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5750, and continue the process.

Moving on to step 9:
The number 644 fits into 5750 8 times, leaving a remainder of 598.
Write down 8 as next digit of the result. 
Result so far: 61757.8
The remainder is 598 after subtracting 5152 from 5750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5980, and continue the process.

Let's proceed to step 10:
When dividing 5980 by 644, we get 9 with a remainder of 184.
Write down 9 as next digit of the result. 
Result so far: 61757.89
Subtracting 5796 from 5980 leaves us with 184.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1840, and continue the process.

On to step 11:
644 can be fit into 1840 2 times, resulting in a remainder of 552.
Use 2 as the next digit of our solution. 
Result so far: 61757.892
The remainder is 552 after subtracting 1288 from 1840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5520, and continue the process.

Going ahead to step 12:
The number 644 fits into 5520 8 times, leaving a remainder of 368.
Use 8 as the next digit of our solution. 
Result so far: 61757.8928
Deduct 5152 from 5520 and we're left with 368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3680, and continue the process.

On to step 13:
644 goes into 3680 5 times with a remainder of 460.
Put 5 as the next digit of the answer. 
Result so far: 61757.89285
Subtracting 3220 from 3680 leaves us with 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Advancing to step 14:
If we divide 4600 by 644, we get 7 and a remainder of 92.
Use 7 as the next digit of our solution. 
Result so far: 61757.892857
Deduct 4508 from 4600 and we're left with 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

On to step 15:
644 goes into 920 1 times with a remainder of 276.
The next digit of our result is 1. 
Result so far: 61757.8928571
Subtracting 644 from 920 leaves us with 276.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2760, and continue the process.

Let's proceed to step 16:
2760 divided by 644 is 4 with a remainder of 184.
Put 4 as the next digit of the answer. 
Result so far: 61757.89285714
Subtracting 2576 from 2760 leaves us with 184.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1840, and continue the process.

The final outcome is 61757.89285714, with a leftover of 1.84e-07.