641650 divided by 51 
Let's see how many times 51 fits into 641650.

Advancing to step 1:
The number 51 fits into 6 0 times, leaving a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 51

Moving on to step 2:
51 can be fit into 64 1 times, resulting in a remainder of 13.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 51 from 64 leaves us with 13.
Grab the next digit (1) from the dividend, add it to 13, then carry on: 131 / 51

Moving on to step 3:
51 can be fit into 131 2 times, resulting in a remainder of 29.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
The remainder is 29 after subtracting 102 from 131.
Bring next digit (6) of the dividend behind the 29 and repeat the process: 296 / 51

Advancing to step 4:
If we divide 296 by 51, we get 5 and a remainder of 41.
Put 5 as the next digit of the answer. 
Result so far: 125.0
Subtracting 255 from 296 leaves us with 41.
Grab the next digit (5) from the dividend, add it to 41, then carry on: 415 / 51

On to step 5:
51 can be fit into 415 8 times, resulting in a remainder of 7.
Use 8 as the next digit of our solution. 
Result so far: 1258.0
Subtracting 408 from 415 leaves us with 7.
Append the next digit (0) from the dividend to 7 and continue with: 70 / 51

Moving on to step 6:
When dividing 70 by 51, we get 1 with a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 12581.0
The remainder is 19 after subtracting 51 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 7:
51 goes into 190 3 times with a remainder of 37.
Record the quotient 3 as the next digit in the result. 
Result so far: 12581.3
Subtract 153 from 190 to get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Advancing to step 8:
If we divide 370 by 51, we get 7 and a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 12581.37
Deduct 357 from 370 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 9:
When dividing 130 by 51, we get 2 with a remainder of 28.
Record the quotient 2 as the next digit in the result. 
Result so far: 12581.372
The remainder is 28 after subtracting 102 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 10:
If we divide 280 by 51, we get 5 and a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 12581.3725
Deduct 255 from 280 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 11:
When dividing 250 by 51, we get 4 with a remainder of 46.
Use 4 as the next digit of our solution. 
Result so far: 12581.37254
Deduct 204 from 250 and we're left 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 12:
The number 51 fits into 460 9 times, leaving a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 12581.372549
The remainder is 1 after subtracting 459 from 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 13:
51 goes into 10 0 times with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 12581.372549
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 14:
100 divided by 51 is 1 with a remainder of 49.
Record the quotient 1 as the next digit in the result. 
Result so far: 12581.37254901
Subtract 51 from 100 to get 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

After the division, we end up with 12581.37254901 and a remainder of 4.9e-08.