We look at the division of 399379 by 84 
Let's see how many times 84 fits into 399379.

Step 1:
The number 84 fits into 3 0 times, leaving a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 84

Step 2:
84 goes into 39 0 times with a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 39 and we're left with 39.
Fetch the next digit (9) from the dividend, attach it to 39 and continue: 399 / 84

Let's proceed to step 3:
If we divide 399 by 84, we get 4 and a remainder of 63.
The next digit of our result is 4. 
Result so far: 4.0
Subtracting 336 from 399 leaves us with 63.
Include the next digit (3) from the dividend after 63, then repeat: 633 / 84

Advancing to step 4:
84 goes into 633 7 times with a remainder of 45.
Put 7 as the next digit of the answer. 
Result so far: 47.0
Deduct 588 from 633 and we're left with 45.
Fetch the next digit (7) from the dividend, attach it to 45 and continue: 457 / 84

Let's proceed to step 5:
If we divide 457 by 84, we get 5 and a remainder of 37.
Put 5 as the next digit of the answer. 
Result so far: 475.0
Subtracting 420 from 457 leaves us with 37.
Include the next digit (9) from the dividend after 37, then repeat: 379 / 84

Advancing to step 6:
The number 84 fits into 379 4 times, leaving a remainder of 43.
The next digit of our result is 4. 
Result so far: 4754.0
If we take 336 away from 379, we end up with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Let's proceed to step 7:
430 divided by 84 is 5 with a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 4754.5
If we subtract 420 from 430, 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 8:
84 can be fit into 100 1 times, resulting in a remainder of 16.
Record the quotient 1 as the next digit in the result. 
Result so far: 4754.51
If we take 84 away from 100, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 9:
If we divide 160 by 84, we get 1 and a remainder of 76.
The next digit of our result is 1. 
Result so far: 4754.511
If we take 84 away from 160, we end up with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

The quotient of the division is 4754.511, and the remainder is 0.0076.