We look at the division of 99521671 by 647 
Let's see how many times 647 fits into 99521671.

Step 1:
If we divide 9 by 647, we get 0 and a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Include the next digit (9) from the dividend after 9, then repeat: 99 / 647

Step 2:
If we divide 99 by 647, we get 0 and a remainder of 99.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 99 to get 99.
Include the next digit (5) from the dividend after 99, then repeat: 995 / 647

Moving on to step 3:
995 divided by 647 is 1 with a remainder of 348.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 647 from 995 to get 348.
Append the next digit (2) from the dividend to 348 and continue with: 3482 / 647

Moving on to step 4:
The number 647 fits into 3482 5 times, leaving a remainder of 247.
Use 5 as the next digit of our solution. 
Result so far: 15.0
The remainder is 247 after subtracting 3235 from 3482.
Include the next digit (1) from the dividend after 247, then repeat: 2471 / 647

On to step 5:
The number 647 fits into 2471 3 times, leaving a remainder of 530.
The next digit of our result is 3. 
Result so far: 153.0
If we take 1941 away from 2471, we end up with 530.
Bring next digit (6) of the dividend behind the 530 and repeat the process: 5306 / 647

Going ahead to step 6:
5306 divided by 647 is 8 with a remainder of 130.
The next digit of our result is 8. 
Result so far: 1538.0
Subtract 5176 from 5306 to get 130.
Grab the next digit (7) from the dividend, add it to 130, then carry on: 1307 / 647

Step 7:
The number 647 fits into 1307 2 times, leaving a remainder of 13.
The number 2 becomes the next digit in our result. 
Result so far: 15382.0
Subtract 1294 from 1307 to get 13.
Fetch the next digit (1) from the dividend, attach it to 13 and continue: 131 / 647

Going ahead to step 8:
When dividing 131 by 647, we get 0 with a remainder of 131.
Put 0 as the next digit of the answer. 
Result so far: 153820.0
Deduct 0 from 131 and we're left with 131.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1310, and continue the process.

On to step 9:
If we divide 1310 by 647, we get 2 and a remainder of 16.
Write down 2 as next digit of the result. 
Result so far: 153820.2
Subtracting 1294 from 1310 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 10:
160 divided by 647 is 0 with a remainder of 160.
Record the quotient 0 as the next digit in the result. 
Result so far: 153820.2
Deduct 0 from 160 and we're left with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Step 11:
1600 divided by 647 is 2 with a remainder of 306.
Record the quotient 2 as the next digit in the result. 
Result so far: 153820.202
If we take 1294 away from 1600, we end up with 306.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3060, and continue the process.

Moving on to step 12:
647 can be fit into 3060 4 times, resulting in a remainder of 472.
The next digit of our result is 4. 
Result so far: 153820.2024
Subtracting 2588 from 3060 leaves us with 472.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4720, and continue the process.

Step 13:
647 goes into 4720 7 times with a remainder of 191.
Put 7 as the next digit of the answer. 
Result so far: 153820.20247
Deduct 4529 from 4720 and we're left with 191.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1910, and continue the process.

Going ahead to step 14:
The number 647 fits into 1910 2 times, leaving a remainder of 616.
Use 2 as the next digit of our solution. 
Result so far: 153820.202472
If we take 1294 away from 1910, we end up with 616.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6160, and continue the process.

On to step 15:
When dividing 6160 by 647, we get 9 with a remainder of 337.
The number 9 becomes the next digit in our result. 
Result so far: 153820.2024729
Subtract 5823 from 6160 to get 337.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3370, and continue the process.

Let's proceed to step 16:
When dividing 3370 by 647, we get 5 with a remainder of 135.
Record the quotient 5 as the next digit in the result. 
Result so far: 153820.20247295
Subtract 3235 from 3370 to get 135.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1350, and continue the process.

After the division, we end up with 153820.20247295 and a remainder of 1.35e-07.