Let's divide 51900591 by 647
We're looking to find how many times 647 goes into 51900591.

Going ahead to step 1:
5 divided by 647 is 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 647

On to step 2:
51 divided by 647 is 0 with a remainder of 51.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Append the next digit (9) from the dividend to 51 and continue with: 519 / 647

Going ahead to step 3:
If we divide 519 by 647, we get 0 and a remainder of 519.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 519 to get 519.
Bring next digit (0) of the dividend behind the 519 and repeat the process: 5190 / 647

Moving on to step 4:
If we divide 5190 by 647, we get 8 and a remainder of 14.
The next digit of our result is 8. 
Result so far: 8.0
Subtracting 5176 from 5190 leaves us with 14.
Append the next digit (0) from the dividend to 14 and continue with: 140 / 647

On to step 5:
The number 647 fits into 140 0 times, leaving a remainder of 140.
Use 0 as the next digit of our solution. 
Result so far: 80.0
The remainder is 140 after subtracting 0 from 140.
Take the next digit (5) from the dividend and append it to 140, then repeat: 1405 / 647

Advancing to step 6:
When dividing 1405 by 647, we get 2 with a remainder of 111.
Record the quotient 2 as the next digit in the result. 
Result so far: 802.0
The remainder is 111 after subtracting 1294 from 1405.
Include the next digit (9) from the dividend after 111, then repeat: 1119 / 647

Let's proceed to step 7:
The number 647 fits into 1119 1 times, leaving a remainder of 472.
Write down 1 as next digit of the result. 
Result so far: 8021.0
The remainder is 472 after subtracting 647 from 1119.
Append the next digit (1) from the dividend to 472 and continue with: 4721 / 647

Let's proceed to step 8:
If we divide 4721 by 647, we get 7 and a remainder of 192.
Write down 7 as next digit of the result. 
Result so far: 80217.0
The remainder is 192 after subtracting 4529 from 4721.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

On to step 9:
647 goes into 1920 2 times with a remainder of 626.
The next digit of our result is 2. 
Result so far: 80217.2
The remainder is 626 after subtracting 1294 from 1920.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6260, and continue the process.

Going ahead to step 10:
647 goes into 6260 9 times with a remainder of 437.
Use 9 as the next digit of our solution. 
Result so far: 80217.29
If we take 5823 away from 6260, we end up with 437.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4370, and continue the process.

Step 11:
If we divide 4370 by 647, we get 6 and a remainder of 488.
The number 6 becomes the next digit in our result. 
Result so far: 80217.296
Subtracting 3882 from 4370 leaves us 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.

Advancing to step 12:
The number 647 fits into 4880 7 times, leaving a remainder of 351.
The number 7 becomes the next digit in our result. 
Result so far: 80217.2967
Subtract 4529 from 4880 to get 351.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3510, and continue the process.

Going ahead to step 13:
The number 647 fits into 3510 5 times, leaving a remainder of 275.
Record the quotient 5 as the next digit in the result. 
Result so far: 80217.29675
Deduct 3235 from 3510 and we're left with 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

Going ahead to step 14:
When dividing 2750 by 647, we get 4 with a remainder of 162.
Use 4 as the next digit of our solution. 
Result so far: 80217.296754
If we take 2588 away from 2750, we end up with 162.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

On to step 15:
The number 647 fits into 1620 2 times, leaving a remainder of 326.
The number 2 becomes the next digit in our result. 
Result so far: 80217.2967542
The remainder is 326 after subtracting 1294 from 1620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3260, and continue the process.

Let's proceed to step 16:
3260 divided by 647 is 5 with a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 80217.29675425
If we subtract 3235 from 3260, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

After the division, we end up with 80217.29675425 and a remainder of 2.5e-08.