390208 ÷ 84 
Our goal is to divide 390208 by 84.

Step 1:
84 goes into 3 0 times with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 84

Step 2:
If we divide 39 by 84, we get 0 and 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.
Append the next digit (0) from the dividend to 39 and continue with: 390 / 84

On to step 3:
If we divide 390 by 84, we get 4 and a remainder of 54.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtracting 336 from 390 leaves us with 54.
Include the next digit (2) from the dividend after 54, then repeat: 542 / 84

Going ahead to step 4:
84 can be fit into 542 6 times, resulting in a remainder of 38.
Put 6 as the next digit of the answer. 
Result so far: 46.0
The remainder is 38 after subtracting 504 from 542.
Append the next digit (0) from the dividend to 38 and continue with: 380 / 84

Moving on to step 5:
380 divided by 84 is 4 with a remainder of 44.
Use 4 as the next digit of our solution. 
Result so far: 464.0
If we subtract 336 from 380, we get 44.
Grab the next digit (8) from the dividend, add it to 44, then carry on: 448 / 84

On to step 6:
If we divide 448 by 84, we get 5 and a remainder of 28.
The number 5 becomes the next digit in our result. 
Result so far: 4645.0
The remainder is 28 after subtracting 420 from 448.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 7:
280 divided by 84 is 3 with a remainder of 28.
Use 3 as the next digit of our solution. 
Result so far: 4645.3
If we subtract 252 from 280, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 8:
If we divide 280 by 84, we get 3 and a remainder of 28.
The number 3 becomes the next digit in our result. 
Result so far: 4645.33
Subtract 252 from 280 to get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

The final outcome is 4645.33, with a leftover of 0.028.