666766 divided by 51 
We're looking to find how many times 51 goes into 666766.

On to step 1:
6 divided by 51 is 0 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.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 51

On to step 2:
66 divided by 51 is 1 with a remainder of 15.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 51 away from 66, we end up with 15.
Grab the next digit (6) from the dividend, add it to 15, then carry on: 156 / 51

Moving on to step 3:
156 divided by 51 is 3 with a remainder of 3.
Use 3 as the next digit of our solution. 
Result so far: 13.0
Deduct 153 from 156 and we're left with 3.
Bring next digit (7) of the dividend behind the 3 and repeat the process: 37 / 51

Going ahead to step 4:
51 can be fit into 37 0 times, resulting in a remainder of 37.
The number 0 becomes the next digit in our result. 
Result so far: 130.0
Subtracting 0 from 37 leaves us with 37.
Append the next digit (6) from the dividend to 37 and continue with: 376 / 51

Step 5:
376 divided by 51 is 7 with a remainder of 19.
Record the quotient 7 as the next digit in the result. 
Result so far: 1307.0
Subtract 357 from 376 to get 19.
Append the next digit (6) from the dividend to 19 and continue with: 196 / 51

Moving on to step 6:
The number 51 fits into 196 3 times, leaving a remainder of 43.
Record the quotient 3 as the next digit in the result. 
Result so far: 13073.0
The remainder is 43 after subtracting 153 from 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Advancing to step 7:
The number 51 fits into 430 8 times, leaving a remainder of 22.
The next digit of our result is 8. 
Result so far: 13073.8
If we subtract 408 from 430, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 8:
220 divided by 51 is 4 with a remainder of 16.
The next digit of our result is 4. 
Result so far: 13073.84
If we take 204 away from 220, we end up 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 9:
51 goes into 160 3 times with a remainder of 7.
Write down 3 as next digit of the result. 
Result so far: 13073.843
Subtract 153 from 160 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 10:
51 goes into 70 1 times with a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 13073.8431
Deduct 51 from 70 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 11:
If we divide 190 by 51, we get 3 and a remainder of 37.
Use 3 as the next digit of our solution. 
Result so far: 13073.84313
Deduct 153 from 190 and we're left with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Going ahead to step 12:
51 can be fit into 370 7 times, resulting in a remainder of 13.
The next digit of our result is 7. 
Result so far: 13073.843137
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.

On to step 13:
If we divide 130 by 51, we get 2 and a remainder of 28.
The number 2 becomes the next digit in our result. 
Result so far: 13073.8431372
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.

Going ahead to step 14:
The number 51 fits into 280 5 times, leaving a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 13073.84313725
If we take 255 away from 280, we end up 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.

The final result is 13073.84313725 with a remainder of 2.5e-08.