We divide 343440 by 8
We're looking to find how many times 8 goes into 343440.

Going ahead to step 1:
The number 8 fits into 3 0 times, leaving a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Fetch the next digit (4) from the dividend, attach it to 3 and continue: 34 / 8

Going ahead to step 2:
8 can be fit into 34 4 times, resulting in a remainder of 2.
Use 4 as the next digit of our solution. 
Result so far: 4.0
The remainder is 2 after subtracting 32 from 34.
Bring next digit (3) of the dividend behind the 2 and repeat the process: 23 / 8

Advancing to step 3:
The number 8 fits into 23 2 times, leaving a remainder of 7.
The number 2 becomes the next digit in our result. 
Result so far: 42.0
Subtracting 16 from 23 leaves us with 7.
Grab the next digit (4) from the dividend, add it to 7, then carry on: 74 / 8

Moving on to step 4:
If we divide 74 by 8, we get 9 and a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 429.0
If we take 72 away from 74, we end up with 2.
Append the next digit (4) from the dividend to 2 and continue with: 24 / 8

On to step 5:
8 can be fit into 24 3 times, resulting in a remainder of 0.
Write down 3 as next digit of the result. 
Result so far: 4293.0
If we subtract 24 from 24, we get 0.
Bring next digit (0) of the dividend behind the 0 and repeat the process: 0 / 8

On to step 6:
8 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 42930.0
Deduct 0 from 0 and we're left 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.

Step 7:
If we divide 0 by 8, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 42930.0
If we subtract 0 from 0, we get 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 8:
The number 8 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 42930.0
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.

In conclusion, the division gives 42930.0 with a balance of 0.0.