We divide 9709351 by 644
We're looking to find how many times 644 goes into 9709351.

Step 1:
644 goes into 9 0 times with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Bring next digit (7) of the dividend behind the 9 and repeat the process: 97 / 644

Advancing to step 2:
When dividing 97 by 644, we get 0 with a remainder of 97.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 97 to get 97.
Take the next digit (0) from the dividend and append it to 97, then repeat: 970 / 644

Advancing to step 3:
When dividing 970 by 644, we get 1 with a remainder of 326.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 644 from 970 to get 326.
Bring next digit (9) of the dividend behind the 326 and repeat the process: 3269 / 644

Advancing to step 4:
If we divide 3269 by 644, we get 5 and a remainder of 49.
Put 5 as the next digit of the answer. 
Result so far: 15.0
If we subtract 3220 from 3269, we get 49.
Bring next digit (3) of the dividend behind the 49 and repeat the process: 493 / 644

Going ahead to step 5:
644 can be fit into 493 0 times, resulting in a remainder of 493.
Use 0 as the next digit of our solution. 
Result so far: 150.0
The remainder is 493 after subtracting 0 from 493.
Fetch the next digit (5) from the dividend, attach it to 493 and continue: 4935 / 644

On to step 6:
If we divide 4935 by 644, we get 7 and a remainder of 427.
The next digit of our result is 7. 
Result so far: 1507.0
If we take 4508 away from 4935, we end up with 427.
Take the next digit (1) from the dividend and append it to 427, then repeat: 4271 / 644

Step 7:
The number 644 fits into 4271 6 times, leaving a remainder of 407.
Record the quotient 6 as the next digit in the result. 
Result so far: 15076.0
Deduct 3864 from 4271 and we're left with 407.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4070, and continue the process.

Let's proceed to step 8:
644 goes into 4070 6 times with a remainder of 206.
The number 6 becomes the next digit in our result. 
Result so far: 15076.6
The remainder is 206 after subtracting 3864 from 4070.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2060, and continue the process.

Step 9:
When dividing 2060 by 644, we get 3 with a remainder of 128.
The next digit of our result is 3. 
Result so far: 15076.63
The remainder is 128 after subtracting 1932 from 2060.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Advancing to step 10:
1280 divided by 644 is 1 with a remainder of 636.
Record the quotient 1 as the next digit in the result. 
Result so far: 15076.631
If we subtract 644 from 1280, we get 636.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6360, and continue the process.

On to step 11:
If we divide 6360 by 644, we get 9 and a remainder of 564.
Put 9 as the next digit of the answer. 
Result so far: 15076.6319
Deduct 5796 from 6360 and we're left with 564.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5640, and continue the process.

Step 12:
644 can be fit into 5640 8 times, resulting in a remainder of 488.
Write down 8 as next digit of the result. 
Result so far: 15076.63198
If we take 5152 away from 5640, we end up with 488.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4880, and continue the process.

Moving on to step 13:
If we divide 4880 by 644, we get 7 and a remainder of 372.
Record the quotient 7 as the next digit in the result. 
Result so far: 15076.631987
Subtract 4508 from 4880 to get 372.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3720, and continue the process.

Going ahead to step 14:
The number 644 fits into 3720 5 times, leaving a remainder of 500.
The next digit of our result is 5. 
Result so far: 15076.6319875
If we take 3220 away from 3720, we end up with 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Advancing to step 15:
When dividing 5000 by 644, we get 7 with a remainder of 492.
Put 7 as the next digit of the answer. 
Result so far: 15076.63198757
Subtracting 4508 from 5000 leaves us with 492.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4920, and continue the process.

The final result is 15076.63198757 with a remainder of 4.92e-07.