97663957 divided by 644 
We're looking to find how many times 644 goes into 97663957.

Going ahead to step 1:
644 goes into 9 0 times with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Fetch the next digit (7) from the dividend, attach it to 9 and continue: 97 / 644

Let's proceed to step 2:
When dividing 97 by 644, we get 0 with a remainder of 97.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 97 leaves us with 97.
Include the next digit (6) from the dividend after 97, then repeat: 976 / 644

Step 3:
When dividing 976 by 644, we get 1 with a remainder of 332.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 644 from 976 and we're left with 332.
Bring next digit (6) of the dividend behind the 332 and repeat the process: 3326 / 644

On to step 4:
644 can be fit into 3326 5 times, resulting in a remainder of 106.
Use 5 as the next digit of our solution. 
Result so far: 15.0
Subtracting 3220 from 3326 leaves us with 106.
Take the next digit (3) from the dividend and append it to 106, then repeat: 1063 / 644

Step 5:
644 can be fit into 1063 1 times, resulting in a remainder of 419.
The number 1 becomes the next digit in our result. 
Result so far: 151.0
Subtracting 644 from 1063 leaves us with 419.
Include the next digit (9) from the dividend after 419, then repeat: 4199 / 644

Let's proceed to step 6:
644 goes into 4199 6 times with a remainder of 335.
The number 6 becomes the next digit in our result. 
Result so far: 1516.0
If we take 3864 away from 4199, we end up with 335.
Grab the next digit (5) from the dividend, add it to 335, then carry on: 3355 / 644

Let's proceed to step 7:
If we divide 3355 by 644, we get 5 and a remainder of 135.
The next digit of our result is 5. 
Result so far: 15165.0
The remainder is 135 after subtracting 3220 from 3355.
Bring next digit (7) of the dividend behind the 135 and repeat the process: 1357 / 644

Going ahead to step 8:
When dividing 1357 by 644, we get 2 with a remainder of 69.
Record the quotient 2 as the next digit in the result. 
Result so far: 151652.0
Subtract 1288 from 1357 to get 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Moving on to step 9:
The number 644 fits into 690 1 times, leaving a remainder of 46.
Put 1 as the next digit of the answer. 
Result so far: 151652.1
Subtracting 644 from 690 leaves us with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Moving on to step 10:
644 can be fit into 460 0 times, resulting in a remainder of 460.
Put 0 as the next digit of the answer. 
Result so far: 151652.1
If we take 0 away from 460, we end up 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 11:
If we divide 4600 by 644, we get 7 and a remainder of 92.
Write down 7 as next digit of the result. 
Result so far: 151652.107
If we take 4508 away from 4600, we end up 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.

Moving on to step 12:
The number 644 fits into 920 1 times, leaving a remainder of 276.
Write down 1 as next digit of the result. 
Result so far: 151652.1071
If we subtract 644 from 920, we get 276.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2760, and continue the process.

Moving on to step 13:
2760 divided by 644 is 4 with a remainder of 184.
The number 4 becomes the next digit in our result. 
Result so far: 151652.10714
Deduct 2576 from 2760 and we're left 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.

Going ahead to step 14:
644 goes into 1840 2 times with a remainder of 552.
Put 2 as the next digit of the answer. 
Result so far: 151652.107142
Deduct 1288 from 1840 and we're left with 552.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5520, and continue the process.

Moving on to step 15:
644 goes into 5520 8 times with a remainder of 368.
The next digit of our result is 8. 
Result so far: 151652.1071428
Subtracting 5152 from 5520 leaves us 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 16:
When dividing 3680 by 644, we get 5 with a remainder of 460.
Put 5 as the next digit of the answer. 
Result so far: 151652.10714285
Subtract 3220 from 3680 to get 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

After the division, we end up with 151652.10714285 and a remainder of 4.6e-07.