We look at the division of 669904 by 84 
Let's see how many times 84 fits into 669904.

Step 1:
84 goes into 6 0 times with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 84

Let's proceed to step 2:
66 divided by 84 is 0 with a remainder of 66.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 66 to get 66.
Fetch the next digit (9) from the dividend, attach it to 66 and continue: 669 / 84

Going ahead to step 3:
The number 84 fits into 669 7 times, leaving a remainder of 81.
Use 7 as the next digit of our solution. 
Result so far: 7.0
If we take 588 away from 669, we end up with 81.
Fetch the next digit (9) from the dividend, attach it to 81 and continue: 819 / 84

Advancing to step 4:
84 can be fit into 819 9 times, resulting in a remainder of 63.
Record the quotient 9 as the next digit in the result. 
Result so far: 79.0
Subtract 756 from 819 to get 63.
Include the next digit (0) from the dividend after 63, then repeat: 630 / 84

Let's proceed to step 5:
630 divided by 84 is 7 with a remainder of 42.
The next digit of our result is 7. 
Result so far: 797.0
If we take 588 away from 630, we end up with 42.
Include the next digit (4) from the dividend after 42, then repeat: 424 / 84

Step 6:
84 goes into 424 5 times with a remainder of 4.
Record the quotient 5 as the next digit in the result. 
Result so far: 7975.0
Subtracting 420 from 424 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 7:
84 goes into 40 0 times with a remainder of 40.
The next digit of our result is 0. 
Result so far: 7975.0
The remainder is 40 after subtracting 0 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 8:
The number 84 fits into 400 4 times, leaving a remainder of 64.
Record the quotient 4 as the next digit in the result. 
Result so far: 7975.04
If we take 336 away from 400, we end up with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 9:
If we divide 640 by 84, we get 7 and a remainder of 52.
Put 7 as the next digit of the answer. 
Result so far: 7975.047
If we take 588 away from 640, we end up with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 10:
If we divide 520 by 84, we get 6 and a remainder of 16.
Use 6 as the next digit of our solution. 
Result so far: 7975.0476
Deduct 504 from 520 and we're left 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.

Let's proceed to step 11:
The number 84 fits into 160 1 times, leaving a remainder of 76.
The number 1 becomes the next digit in our result. 
Result so far: 7975.04761
Subtracting 84 from 160 leaves us 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.

Step 12:
84 can be fit into 760 9 times, resulting in a remainder of 4.
Use 9 as the next digit of our solution. 
Result so far: 7975.047619
If we subtract 756 from 760, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 13:
If we divide 40 by 84, we get 0 and a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 7975.047619
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 14:
84 goes into 400 4 times with a remainder of 64.
The number 4 becomes the next digit in our result. 
Result so far: 7975.04761904
Subtracting 336 from 400 leaves us with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

The final result is 7975.04761904 with a remainder of 6.4e-08.