Let's divide 393716 by 51
We're looking to find how many times 51 goes into 393716.

On to step 1:
51 can be fit into 3 0 times, resulting in a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 51

Advancing to step 2:
If we divide 39 by 51, we get 0 and a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 39, we end up with 39.
Take the next digit (3) from the dividend and append it to 39, then repeat: 393 / 51

Step 3:
When dividing 393 by 51, we get 7 with a remainder of 36.
Put 7 as the next digit of the answer. 
Result so far: 7.0
The remainder is 36 after subtracting 357 from 393.
Bring next digit (7) of the dividend behind the 36 and repeat the process: 367 / 51

Moving on to step 4:
When dividing 367 by 51, we get 7 with a remainder of 10.
Record the quotient 7 as the next digit in the result. 
Result so far: 77.0
Deduct 357 from 367 and we're left with 10.
Include the next digit (1) from the dividend after 10, then repeat: 101 / 51

Moving on to step 5:
When dividing 101 by 51, we get 1 with a remainder of 50.
The next digit of our result is 1. 
Result so far: 771.0
The remainder is 50 after subtracting 51 from 101.
Bring next digit (6) of the dividend behind the 50 and repeat the process: 506 / 51

Moving on to step 6:
If we divide 506 by 51, we get 9 and a remainder of 47.
Record the quotient 9 as the next digit in the result. 
Result so far: 7719.0
The remainder is 47 after subtracting 459 from 506.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Going ahead to step 7:
51 can be fit into 470 9 times, resulting in a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 7719.9
Subtracting 459 from 470 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 8:
110 divided by 51 is 2 with a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 7719.92
Subtracting 102 from 110 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 9:
51 goes into 80 1 times with a remainder of 29.
Put 1 as the next digit of the answer. 
Result so far: 7719.921
Subtracting 51 from 80 leaves us with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Step 10:
The number 51 fits into 290 5 times, leaving a remainder of 35.
The number 5 becomes the next digit in our result. 
Result so far: 7719.9215
If we take 255 away from 290, we end up with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Advancing to step 11:
51 goes into 350 6 times with a remainder of 44.
Write down 6 as next digit of the result. 
Result so far: 7719.92156
If we take 306 away from 350, we end up with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

On to step 12:
440 divided by 51 is 8 with a remainder of 32.
The next digit of our result is 8. 
Result so far: 7719.921568
Deduct 408 from 440 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Advancing to step 13:
320 divided by 51 is 6 with a remainder of 14.
Write down 6 as next digit of the result. 
Result so far: 7719.9215686
If we take 306 away from 320, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 14:
When dividing 140 by 51, we get 2 with a remainder of 38.
Put 2 as the next digit of the answer. 
Result so far: 7719.92156862
Subtract 102 from 140 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

The final result is 7719.92156862 with a remainder of 3.8e-08.