343979 divided by 80 
We want to figure out the number of times 343979 can be divided by 80.

Going ahead to step 1:
When dividing 3 by 80, we get 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
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 / 80

Moving on to step 2:
34 divided by 80 is 0 with a remainder of 34.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 34, we end up with 34.
Grab the next digit (3) from the dividend, add it to 34, then carry on: 343 / 80

Moving on to step 3:
The number 80 fits into 343 4 times, leaving a remainder of 23.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtracting 320 from 343 leaves us with 23.
Fetch the next digit (9) from the dividend, attach it to 23 and continue: 239 / 80

Going ahead to step 4:
When dividing 239 by 80, we get 2 with a remainder of 79.
Record the quotient 2 as the next digit in the result. 
Result so far: 42.0
The remainder is 79 after subtracting 160 from 239.
Take the next digit (7) from the dividend and append it to 79, then repeat: 797 / 80

Moving on to step 5:
The number 80 fits into 797 9 times, leaving a remainder of 77.
Record the quotient 9 as the next digit in the result. 
Result so far: 429.0
If we subtract 720 from 797, we get 77.
Append the next digit (9) from the dividend to 77 and continue with: 779 / 80

Step 6:
80 goes into 779 9 times with a remainder of 59.
Use 9 as the next digit of our solution. 
Result so far: 4299.0
Deduct 720 from 779 and we're left with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Let's proceed to step 7:
When dividing 590 by 80, we get 7 with a remainder of 30.
The number 7 becomes the next digit in our result. 
Result so far: 4299.7
If we take 560 away from 590, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 8:
The number 80 fits into 300 3 times, leaving a remainder of 60.
Write down 3 as next digit of the result. 
Result so far: 4299.73
Subtract 240 from 300 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 9:
The number 80 fits into 600 7 times, leaving a remainder of 40.
The number 7 becomes the next digit in our result. 
Result so far: 4299.737
Subtract 560 from 600 to get 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 10:
80 goes into 400 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 4299.7375
Subtract 400 from 400 to 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.

Going ahead to step 11:
The number 80 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 4299.7375
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 12:
When dividing 0 by 80, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 4299.7375
If we take 0 away from 0, 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.

Our division results in 4299.7375 with a remaining 0.0.