We're dividing 651459 by 51 
Let's see how many times 51 fits into 651459.

Going ahead to step 1:
51 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Grab the next digit (5) from the dividend, add it to 6, then carry on: 65 / 51

Moving on to step 2:
51 can be fit into 65 1 times, resulting in a remainder of 14.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 51 from 65, we get 14.
Grab the next digit (1) from the dividend, add it to 14, then carry on: 141 / 51

On to step 3:
When dividing 141 by 51, we get 2 with a remainder of 39.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
Subtract 102 from 141 to get 39.
Grab the next digit (4) from the dividend, add it to 39, then carry on: 394 / 51

On to step 4:
When dividing 394 by 51, we get 7 with a remainder of 37.
The next digit of our result is 7. 
Result so far: 127.0
Deduct 357 from 394 and we're left with 37.
Bring next digit (5) of the dividend behind the 37 and repeat the process: 375 / 51

Step 5:
The number 51 fits into 375 7 times, leaving a remainder of 18.
Use 7 as the next digit of our solution. 
Result so far: 1277.0
If we take 357 away from 375, we end up with 18.
Append the next digit (9) from the dividend to 18 and continue with: 189 / 51

Step 6:
51 can be fit into 189 3 times, resulting in a remainder of 36.
Write down 3 as next digit of the result. 
Result so far: 12773.0
The remainder is 36 after subtracting 153 from 189.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 7:
When dividing 360 by 51, we get 7 with a remainder of 3.
The next digit of our result is 7. 
Result so far: 12773.7
If we take 357 away from 360, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 8:
When dividing 30 by 51, we get 0 with a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 12773.7
Subtract 0 from 30 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 9:
When dividing 300 by 51, we get 5 with a remainder of 45.
Write down 5 as next digit of the result. 
Result so far: 12773.705
If we subtract 255 from 300, we get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Moving on to step 10:
If we divide 450 by 51, we get 8 and a remainder of 42.
The number 8 becomes the next digit in our result. 
Result so far: 12773.7058
If we take 408 away from 450, we end up with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Going ahead to step 11:
When dividing 420 by 51, we get 8 with a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 12773.70588
Deduct 408 from 420 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final result is 12773.70588 with a remainder of 1.2e-05.