We're dividing 661213 by 51 
We want to divide 661213 by 51.

On to step 1:
51 can be fit into 6 0 times, resulting in a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 51

Going ahead to step 2:
When dividing 66 by 51, we get 1 with a remainder of 15.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 51 from 66 leaves us with 15.
Grab the next digit (1) from the dividend, add it to 15, then carry on: 151 / 51

Moving on to step 3:
151 divided by 51 is 2 with a remainder of 49.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Subtracting 102 from 151 leaves us with 49.
Fetch the next digit (2) from the dividend, attach it to 49 and continue: 492 / 51

Advancing to step 4:
51 goes into 492 9 times with a remainder of 33.
Write down 9 as next digit of the result. 
Result so far: 129.0
The remainder is 33 after subtracting 459 from 492.
Append the next digit (1) from the dividend to 33 and continue with: 331 / 51

On to step 5:
331 divided by 51 is 6 with a remainder of 25.
The number 6 becomes the next digit in our result. 
Result so far: 1296.0
If we take 306 away from 331, we end up with 25.
Take the next digit (3) from the dividend and append it to 25, then repeat: 253 / 51

Going ahead to step 6:
If we divide 253 by 51, we get 4 and a remainder of 49.
The number 4 becomes the next digit in our result. 
Result so far: 12964.0
Subtract 204 from 253 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.

Going ahead to step 7:
51 goes into 490 9 times with a remainder of 31.
Write down 9 as next digit of the result. 
Result so far: 12964.9
Subtract 459 from 490 to get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Going ahead to step 8:
The number 51 fits into 310 6 times, leaving a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 12964.96
If we subtract 306 from 310, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 9:
If we divide 40 by 51, we get 0 and a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 12964.96
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 10:
When dividing 400 by 51, we get 7 with a remainder of 43.
Put 7 as the next digit of the answer. 
Result so far: 12964.9607
Deduct 357 from 400 and we're left with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Moving on to step 11:
The number 51 fits into 430 8 times, leaving a remainder of 22.
The number 8 becomes the next digit in our result. 
Result so far: 12964.96078
The remainder is 22 after subtracting 408 from 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 12:
51 goes into 220 4 times with a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 12964.960784
Subtracting 204 from 220 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.

Going ahead to step 13:
If we divide 160 by 51, we get 3 and a remainder of 7.
The next digit of our result is 3. 
Result so far: 12964.9607843
If we take 153 away from 160, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 14:
When dividing 70 by 51, we get 1 with a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 12964.96078431
If we subtract 51 from 70, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Our division results in 12964.96078431 with a remaining 1.9e-08.