We're dividing 390436 by 5 
We want to divide 390436 by 5.

Step 1:
The number 5 fits into 3 0 times, leaving a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 5

On to step 2:
If we divide 39 by 5, we get 7 and a remainder of 4.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
If we take 35 away from 39, we end up with 4.
Append the next digit (0) from the dividend to 4 and continue with: 40 / 5

On to step 3:
5 can be fit into 40 8 times, resulting in a remainder of 0.
The next digit of our result is 8. 
Result so far: 78.0
If we take 40 away from 40, we end up with 0.
Take the next digit (4) from the dividend and append it to 0, then repeat: 4 / 5

On to step 4:
5 goes into 4 0 times with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 780.0
If we take 0 away from 4, we end up with 4.
Include the next digit (3) from the dividend after 4, then repeat: 43 / 5

Step 5:
5 can be fit into 43 8 times, resulting in a remainder of 3.
Use 8 as the next digit of our solution. 
Result so far: 7808.0
If we take 40 away from 43, we end up with 3.
Grab the next digit (6) from the dividend, add it to 3, then carry on: 36 / 5

Going ahead to step 6:
5 can be fit into 36 7 times, resulting in a remainder of 1.
Record the quotient 7 as the next digit in the result. 
Result so far: 78087.0
Subtract 35 from 36 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.

Step 7:
The number 5 fits into 10 2 times, leaving a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 78087.2
If we subtract 10 from 10, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 8:
5 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 78087.2
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 9:
The number 5 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 78087.2
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 78087.2 and a remainder of 0.0.