399240 ÷ 79 
Let's see how many times 79 fits into 399240.

Moving on to step 1:
The number 79 fits into 3 0 times, leaving a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 79

Advancing to step 2:
79 goes into 39 0 times with a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 39, we end up with 39.
Fetch the next digit (9) from the dividend, attach it to 39 and continue: 399 / 79

Let's proceed to step 3:
When dividing 399 by 79, we get 5 with a remainder of 4.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Subtract 395 from 399 to get 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 79

Moving on to step 4:
42 divided by 79 is 0 with a remainder of 42.
Use 0 as the next digit of our solution. 
Result so far: 50.0
If we subtract 0 from 42, we get 42.
Bring next digit (4) of the dividend behind the 42 and repeat the process: 424 / 79

Advancing to step 5:
79 can be fit into 424 5 times, resulting in a remainder of 29.
Use 5 as the next digit of our solution. 
Result so far: 505.0
Deduct 395 from 424 and we're left with 29.
Bring next digit (0) of the dividend behind the 29 and repeat the process: 290 / 79

Let's proceed to step 6:
79 can be fit into 290 3 times, resulting in a remainder of 53.
The next digit of our result is 3. 
Result so far: 5053.0
Subtracting 237 from 290 leaves us with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Advancing to step 7:
When dividing 530 by 79, we get 6 with a remainder of 56.
Write down 6 as next digit of the result. 
Result so far: 5053.6
Subtracting 474 from 530 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Going ahead to step 8:
79 can be fit into 560 7 times, resulting in a remainder of 7.
Use 7 as the next digit of our solution. 
Result so far: 5053.67
If we subtract 553 from 560, we 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.

Step 9:
The number 79 fits into 70 0 times, leaving a remainder of 70.
Write down 0 as next digit of the result. 
Result so far: 5053.67
If we subtract 0 from 70, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 10:
The number 79 fits into 700 8 times, leaving a remainder of 68.
Record the quotient 8 as the next digit in the result. 
Result so far: 5053.6708
If we take 632 away from 700, we end up with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Step 11:
79 can be fit into 680 8 times, resulting in a remainder of 48.
The number 8 becomes the next digit in our result. 
Result so far: 5053.67088
If we take 632 away from 680, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

The final result is 5053.67088 with a remainder of 4.8e-05.