We look at the division of 391059 by 51 
Our goal is to divide 391059 by 51.

Let's proceed to step 1:
51 can be fit into 3 0 times, resulting in a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 51

Let's proceed to step 2:
51 can be fit into 39 0 times, resulting in a remainder of 39.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 39 after subtracting 0 from 39.
Take the next digit (1) from the dividend and append it to 39, then repeat: 391 / 51

Moving on to step 3:
51 goes into 391 7 times with a remainder of 34.
Put 7 as the next digit of the answer. 
Result so far: 7.0
The remainder is 34 after subtracting 357 from 391.
Grab the next digit (0) from the dividend, add it to 34, then carry on: 340 / 51

Advancing to step 4:
If we divide 340 by 51, we get 6 and a remainder of 34.
The next digit of our result is 6. 
Result so far: 76.0
Subtracting 306 from 340 leaves us with 34.
Include the next digit (5) from the dividend after 34, then repeat: 345 / 51

Advancing to step 5:
51 goes into 345 6 times with a remainder of 39.
Record the quotient 6 as the next digit in the result. 
Result so far: 766.0
The remainder is 39 after subtracting 306 from 345.
Include the next digit (9) from the dividend after 39, then repeat: 399 / 51

Advancing to step 6:
If we divide 399 by 51, we get 7 and a remainder of 42.
The next digit of our result is 7. 
Result so far: 7667.0
The remainder is 42 after subtracting 357 from 399.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 7:
51 can be fit into 420 8 times, resulting in a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 7667.8
The remainder is 12 after subtracting 408 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 8:
The number 51 fits into 120 2 times, leaving a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 7667.82
Subtracting 102 from 120 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 9:
When dividing 180 by 51, we get 3 with a remainder of 27.
Use 3 as the next digit of our solution. 
Result so far: 7667.823
If we subtract 153 from 180, we get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Advancing to step 10:
The number 51 fits into 270 5 times, leaving a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 7667.8235
If we subtract 255 from 270, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 11:
If we divide 150 by 51, we get 2 and a remainder of 48.
Use 2 as the next digit of our solution. 
Result so far: 7667.82352
The remainder is 48 after subtracting 102 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 12:
If we divide 480 by 51, we get 9 and a remainder of 21.
The next digit of our result is 9. 
Result so far: 7667.823529
Subtract 459 from 480 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Advancing to step 13:
51 goes into 210 4 times with a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 7667.8235294
Subtract 204 from 210 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 14:
51 can be fit into 60 1 times, resulting in a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 7667.82352941
The remainder is 9 after subtracting 51 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

The final result is 7667.82352941 with a remainder of 9e-09.