399610 ÷ 51 
We want to divide 399610 by 51.

On to step 1:
3 divided by 51 is 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 51

Advancing to step 2:
39 divided by 51 is 0 with a remainder of 39.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 39, we end up with 39.
Grab the next digit (9) from the dividend, add it to 39, then carry on: 399 / 51

Advancing to step 3:
51 goes into 399 7 times with a remainder of 42.
Put 7 as the next digit of the answer. 
Result so far: 7.0
If we take 357 away from 399, we end up with 42.
Fetch the next digit (6) from the dividend, attach it to 42 and continue: 426 / 51

On to step 4:
The number 51 fits into 426 8 times, leaving a remainder of 18.
Record the quotient 8 as the next digit in the result. 
Result so far: 78.0
The remainder is 18 after subtracting 408 from 426.
Include the next digit (1) from the dividend after 18, then repeat: 181 / 51

Advancing to step 5:
181 divided by 51 is 3 with a remainder of 28.
Write down 3 as next digit of the result. 
Result so far: 783.0
Subtracting 153 from 181 leaves us with 28.
Fetch the next digit (0) from the dividend, attach it to 28 and continue: 280 / 51

Advancing to step 6:
51 goes into 280 5 times with a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 7835.0
Subtracting 255 from 280 leaves us 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.

Let's proceed to step 7:
When dividing 250 by 51, we get 4 with a remainder of 46.
Record the quotient 4 as the next digit in the result. 
Result so far: 7835.4
Subtracting 204 from 250 leaves us with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 8:
When dividing 460 by 51, we get 9 with a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 7835.49
Subtract 459 from 460 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 9:
51 can be fit into 10 0 times, resulting in a remainder of 10.
The next digit of our result is 0. 
Result so far: 7835.49
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 10:
51 can be fit into 100 1 times, resulting in a remainder of 49.
Use 1 as the next digit of our solution. 
Result so far: 7835.4901
Deduct 51 from 100 and we're left with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Let's proceed to step 11:
If we divide 490 by 51, we get 9 and a remainder of 31.
The number 9 becomes the next digit in our result. 
Result so far: 7835.49019
Subtracting 459 from 490 leaves us with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Moving on to step 12:
310 divided by 51 is 6 with a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 7835.490196
Subtracting 306 from 310 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 13:
51 can be fit into 40 0 times, resulting in a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 7835.490196
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.

Let's proceed to step 14:
400 divided by 51 is 7 with a remainder of 43.
Put 7 as the next digit of the answer. 
Result so far: 7835.49019607
Subtract 357 from 400 to get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

In conclusion, the division gives 7835.49019607 with a balance of 4.3e-08.