We're dividing 343286 by 84 
We want to figure out the number of times 343286 can be divided by 84.

Step 1:
If we divide 3 by 84, we get 0 and a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Bring next digit (4) of the dividend behind the 3 and repeat the process: 34 / 84

Advancing to step 2:
34 divided by 84 is 0 with a remainder of 34.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 34 to get 34.
Take the next digit (3) from the dividend and append it to 34, then repeat: 343 / 84

Advancing to step 3:
84 goes into 343 4 times with a remainder of 7.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
The remainder is 7 after subtracting 336 from 343.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 84

Step 4:
The number 84 fits into 72 0 times, leaving a remainder of 72.
Write down 0 as next digit of the result. 
Result so far: 40.0
Subtracting 0 from 72 leaves us with 72.
Bring next digit (8) of the dividend behind the 72 and repeat the process: 728 / 84

Advancing to step 5:
728 divided by 84 is 8 with a remainder of 56.
Use 8 as the next digit of our solution. 
Result so far: 408.0
Subtract 672 from 728 to get 56.
Include the next digit (6) from the dividend after 56, then repeat: 566 / 84

Let's proceed to step 6:
If we divide 566 by 84, we get 6 and a remainder of 62.
The next digit of our result is 6. 
Result so far: 4086.0
If we take 504 away from 566, we end up with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

On to step 7:
84 can be fit into 620 7 times, resulting in a remainder of 32.
Use 7 as the next digit of our solution. 
Result so far: 4086.7
Subtracting 588 from 620 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 8:
84 goes into 320 3 times with a remainder of 68.
Use 3 as the next digit of our solution. 
Result so far: 4086.73
If we subtract 252 from 320, we get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Let's proceed to step 9:
84 can be fit into 680 8 times, resulting in a remainder of 8.
Use 8 as the next digit of our solution. 
Result so far: 4086.738
The remainder is 8 after subtracting 672 from 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 10:
80 divided by 84 is 0 with a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 4086.738
Deduct 0 from 80 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

On to step 11:
When dividing 800 by 84, we get 9 with a remainder of 44.
Use 9 as the next digit of our solution. 
Result so far: 4086.73809
Deduct 756 from 800 and we're left with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 12:
84 can be fit into 440 5 times, resulting in a remainder of 20.
Record the quotient 5 as the next digit in the result. 
Result so far: 4086.738095
The remainder is 20 after subtracting 420 from 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 13:
200 divided by 84 is 2 with a remainder of 32.
Use 2 as the next digit of our solution. 
Result so far: 4086.7380952
If we subtract 168 from 200, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 14:
320 divided by 84 is 3 with a remainder of 68.
Write down 3 as next digit of the result. 
Result so far: 4086.73809523
The remainder is 68 after subtracting 252 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

The final result is 4086.73809523 with a remainder of 6.8e-08.