We divide 343959 by 4
We're looking to find how many times 4 goes into 343959.

Going ahead to step 1:
When dividing 3 by 4, we get 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Include the next digit (4) from the dividend after 3, then repeat: 34 / 4

Advancing to step 2:
34 divided by 4 is 8 with a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Deduct 32 from 34 and we're left with 2.
Bring next digit (3) of the dividend behind the 2 and repeat the process: 23 / 4

Let's proceed to step 3:
The number 4 fits into 23 5 times, leaving a remainder of 3.
The next digit of our result is 5. 
Result so far: 85.0
Deduct 20 from 23 and we're left with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 4

Advancing to step 4:
4 goes into 39 9 times with a remainder of 3.
Put 9 as the next digit of the answer. 
Result so far: 859.0
Deduct 36 from 39 and we're left with 3.
Include the next digit (5) from the dividend after 3, then repeat: 35 / 4

Advancing to step 5:
The number 4 fits into 35 8 times, leaving a remainder of 3.
Use 8 as the next digit of our solution. 
Result so far: 8598.0
If we subtract 32 from 35, we get 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 4

Advancing to step 6:
4 goes into 39 9 times with a remainder of 3.
The number 9 becomes the next digit in our result. 
Result so far: 85989.0
If we subtract 36 from 39, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 7:
The number 4 fits into 30 7 times, leaving a remainder of 2.
The number 7 becomes the next digit in our result. 
Result so far: 85989.7
Subtract 28 from 30 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 8:
The number 4 fits into 20 5 times, leaving a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 85989.75
If we take 20 away from 20, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 9:
When dividing 0 by 4, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 85989.75
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 10:
4 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 85989.75
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 85989.75 with a remainder of 0.0.