We divide 312599 by 84
Let's see how many times 84 fits into 312599.

Let's proceed to step 1:
3 divided by 84 is 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Fetch the next digit (1) from the dividend, attach it to 3 and continue: 31 / 84

Step 2:
The number 84 fits into 31 0 times, leaving a remainder of 31.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 31, we end up with 31.
Take the next digit (2) from the dividend and append it to 31, then repeat: 312 / 84

On to step 3:
84 can be fit into 312 3 times, resulting in a remainder of 60.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we take 252 away from 312, we end up with 60.
Take the next digit (5) from the dividend and append it to 60, then repeat: 605 / 84

Let's proceed to step 4:
605 divided by 84 is 7 with a remainder of 17.
Write down 7 as next digit of the result. 
Result so far: 37.0
Subtract 588 from 605 to get 17.
Fetch the next digit (9) from the dividend, attach it to 17 and continue: 179 / 84

Let's proceed to step 5:
If we divide 179 by 84, we get 2 and a remainder of 11.
The next digit of our result is 2. 
Result so far: 372.0
If we take 168 away from 179, we end up with 11.
Bring next digit (9) of the dividend behind the 11 and repeat the process: 119 / 84

Let's proceed to step 6:
119 divided by 84 is 1 with a remainder of 35.
The next digit of our result is 1. 
Result so far: 3721.0
If we subtract 84 from 119, we get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Step 7:
350 divided by 84 is 4 with a remainder of 14.
Use 4 as the next digit of our solution. 
Result so far: 3721.4
Deduct 336 from 350 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 8:
If we divide 140 by 84, we get 1 and a remainder of 56.
Use 1 as the next digit of our solution. 
Result so far: 3721.41
The remainder is 56 after subtracting 84 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Moving on to step 9:
The number 84 fits into 560 6 times, leaving a remainder of 56.
The next digit of our result is 6. 
Result so far: 3721.416
If we subtract 504 from 560, we get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Moving on to step 10:
84 goes into 560 6 times with a remainder of 56.
Record the quotient 6 as the next digit in the result. 
Result so far: 3721.4166
Subtracting 504 from 560 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.

The final outcome is 3721.4166, with a leftover of 0.00056.