65037375 ÷ 644 
We want to figure out the number of times 65037375 can be divided by 644.

On to step 1:
644 can be fit into 6 0 times, resulting in a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (5) of the dividend behind the 6 and repeat the process: 65 / 644

Step 2:
When dividing 65 by 644, we get 0 with a remainder of 65.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 65, we end up with 65.
Take the next digit (0) from the dividend and append it to 65, then repeat: 650 / 644

Let's proceed to step 3:
644 can be fit into 650 1 times, resulting in a remainder of 6.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 644 from 650, we get 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 644

On to step 4:
The number 644 fits into 63 0 times, leaving a remainder of 63.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
If we take 0 away from 63, we end up with 63.
Include the next digit (7) from the dividend after 63, then repeat: 637 / 644

Advancing to step 5:
644 goes into 637 0 times with a remainder of 637.
Use 0 as the next digit of our solution. 
Result so far: 100.0
If we subtract 0 from 637, we get 637.
Append the next digit (3) from the dividend to 637 and continue with: 6373 / 644

Step 6:
644 goes into 6373 9 times with a remainder of 577.
The next digit of our result is 9. 
Result so far: 1009.0
The remainder is 577 after subtracting 5796 from 6373.
Take the next digit (7) from the dividend and append it to 577, then repeat: 5777 / 644

Step 7:
644 goes into 5777 8 times with a remainder of 625.
Put 8 as the next digit of the answer. 
Result so far: 10098.0
Subtracting 5152 from 5777 leaves us with 625.
Fetch the next digit (5) from the dividend, attach it to 625 and continue: 6255 / 644

Let's proceed to step 8:
If we divide 6255 by 644, we get 9 and a remainder of 459.
Use 9 as the next digit of our solution. 
Result so far: 100989.0
Subtract 5796 from 6255 to get 459.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4590, and continue the process.

Moving on to step 9:
644 goes into 4590 7 times with a remainder of 82.
Use 7 as the next digit of our solution. 
Result so far: 100989.7
If we subtract 4508 from 4590, we get 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Step 10:
820 divided by 644 is 1 with a remainder of 176.
The number 1 becomes the next digit in our result. 
Result so far: 100989.71
The remainder is 176 after subtracting 644 from 820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

Advancing to step 11:
1760 divided by 644 is 2 with a remainder of 472.
Use 2 as the next digit of our solution. 
Result so far: 100989.712
If we subtract 1288 from 1760, we get 472.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4720, and continue the process.

Going ahead to step 12:
When dividing 4720 by 644, we get 7 with a remainder of 212.
The next digit of our result is 7. 
Result so far: 100989.7127
Deduct 4508 from 4720 and we're left with 212.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2120, and continue the process.

Moving on to step 13:
The number 644 fits into 2120 3 times, leaving a remainder of 188.
The number 3 becomes the next digit in our result. 
Result so far: 100989.71273
The remainder is 188 after subtracting 1932 from 2120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

Moving on to step 14:
If we divide 1880 by 644, we get 2 and a remainder of 592.
The number 2 becomes the next digit in our result. 
Result so far: 100989.712732
If we take 1288 away from 1880, we end up with 592.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5920, and continue the process.

Step 15:
5920 divided by 644 is 9 with a remainder of 124.
The number 9 becomes the next digit in our result. 
Result so far: 100989.7127329
Subtracting 5796 from 5920 leaves us with 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Let's proceed to step 16:
644 can be fit into 1240 1 times, resulting in a remainder of 596.
Put 1 as the next digit of the answer. 
Result so far: 100989.71273291
If we subtract 644 from 1240, we get 596.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5960, and continue the process.

Our division results in 100989.71273291 with a remaining 5.96e-07.