We look at the division of 345402 by 84 
Let's see how many times 84 fits into 345402.

Step 1:
3 divided by 84 is 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Include the next digit (4) from the dividend after 3, then repeat: 34 / 84

Step 2:
When dividing 34 by 84, we get 0 with a remainder of 34.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 34 after subtracting 0 from 34.
Bring next digit (5) of the dividend behind the 34 and repeat the process: 345 / 84

On to step 3:
84 can be fit into 345 4 times, resulting in a remainder of 9.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we take 336 away from 345, we end up with 9.
Grab the next digit (4) from the dividend, add it to 9, then carry on: 94 / 84

Advancing to step 4:
84 can be fit into 94 1 times, resulting in a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 41.0
Subtracting 84 from 94 leaves us with 10.
Append the next digit (0) from the dividend to 10 and continue with: 100 / 84

Moving on to step 5:
84 can be fit into 100 1 times, resulting in a remainder of 16.
Use 1 as the next digit of our solution. 
Result so far: 411.0
Subtracting 84 from 100 leaves us with 16.
Take the next digit (2) from the dividend and append it to 16, then repeat: 162 / 84

Let's proceed to step 6:
The number 84 fits into 162 1 times, leaving a remainder of 78.
Use 1 as the next digit of our solution. 
Result so far: 4111.0
If we subtract 84 from 162, we get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Let's proceed to step 7:
84 can be fit into 780 9 times, resulting in a remainder of 24.
Write down 9 as next digit of the result. 
Result so far: 4111.9
If we take 756 away from 780, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 8:
240 divided by 84 is 2 with a remainder of 72.
The number 2 becomes the next digit in our result. 
Result so far: 4111.92
If we take 168 away from 240, we end up with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

On to step 9:
720 divided by 84 is 8 with a remainder of 48.
Record the quotient 8 as the next digit in the result. 
Result so far: 4111.928
Subtract 672 from 720 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 10:
The number 84 fits into 480 5 times, leaving a remainder of 60.
Record the quotient 5 as the next digit in the result. 
Result so far: 4111.9285
Deduct 420 from 480 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 11:
When dividing 600 by 84, we get 7 with a remainder of 12.
The next digit of our result is 7. 
Result so far: 4111.92857
Subtract 588 from 600 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 12:
84 can be fit into 120 1 times, resulting in a remainder of 36.
Put 1 as the next digit of the answer. 
Result so far: 4111.928571
Subtracting 84 from 120 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 13:
360 divided by 84 is 4 with a remainder of 24.
The next digit of our result is 4. 
Result so far: 4111.9285714
Subtract 336 from 360 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 14:
84 can be fit into 240 2 times, resulting in a remainder of 72.
The number 2 becomes the next digit in our result. 
Result so far: 4111.92857142
If we take 168 away from 240, we end up with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

After the division, we end up with 4111.92857142 and a remainder of 7.2e-08.