351178 ÷ 80 
We want to figure out the number of times 351178 can be divided by 80.

Going ahead to step 1:
If we divide 3 by 80, we get 0 and a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Grab the next digit (5) from the dividend, add it to 3, then carry on: 35 / 80

On to step 2:
35 divided by 80 is 0 with a remainder of 35.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 35 leaves us with 35.
Fetch the next digit (1) from the dividend, attach it to 35 and continue: 351 / 80

On to step 3:
80 goes into 351 4 times with a remainder of 31.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
The remainder is 31 after subtracting 320 from 351.
Include the next digit (1) from the dividend after 31, then repeat: 311 / 80

Let's proceed to step 4:
80 goes into 311 3 times with a remainder of 71.
Write down 3 as next digit of the result. 
Result so far: 43.0
Subtracting 240 from 311 leaves us with 71.
Fetch the next digit (7) from the dividend, attach it to 71 and continue: 717 / 80

Advancing to step 5:
80 goes into 717 8 times with a remainder of 77.
The next digit of our result is 8. 
Result so far: 438.0
If we subtract 640 from 717, we get 77.
Fetch the next digit (8) from the dividend, attach it to 77 and continue: 778 / 80

Going ahead to step 6:
If we divide 778 by 80, we get 9 and a remainder of 58.
Put 9 as the next digit of the answer. 
Result so far: 4389.0
Subtracting 720 from 778 leaves us with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Moving on to step 7:
580 divided by 80 is 7 with a remainder of 20.
Record the quotient 7 as the next digit in the result. 
Result so far: 4389.7
Deduct 560 from 580 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 8:
The number 80 fits into 200 2 times, leaving a remainder of 40.
Write down 2 as next digit of the result. 
Result so far: 4389.72
Subtract 160 from 200 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.

Step 9:
400 divided by 80 is 5 with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 4389.725
Subtracting 400 from 400 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.

On to step 10:
80 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 4389.725
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.

Let's proceed to step 11:
If we divide 0 by 80, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 4389.725
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.

The final result is 4389.725 with a remainder of 0.0.