We're dividing 154143 by 80 
Let's see how many times 80 fits into 154143.

Step 1:
If we divide 1 by 80, we get 0 and a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 80

On to step 2:
If we divide 15 by 80, we get 0 and a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 15 and we're left with 15.
Bring next digit (4) of the dividend behind the 15 and repeat the process: 154 / 80

Advancing to step 3:
80 goes into 154 1 times with a remainder of 74.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 74 after subtracting 80 from 154.
Append the next digit (1) from the dividend to 74 and continue with: 741 / 80

Moving on to step 4:
The number 80 fits into 741 9 times, leaving a remainder of 21.
The next digit of our result is 9. 
Result so far: 19.0
Subtract 720 from 741 to get 21.
Fetch the next digit (4) from the dividend, attach it to 21 and continue: 214 / 80

Advancing to step 5:
214 divided by 80 is 2 with a remainder of 54.
The number 2 becomes the next digit in our result. 
Result so far: 192.0
Deduct 160 from 214 and we're left with 54.
Take the next digit (3) from the dividend and append it to 54, then repeat: 543 / 80

On to step 6:
If we divide 543 by 80, we get 6 and a remainder of 63.
The next digit of our result is 6. 
Result so far: 1926.0
Subtract 480 from 543 to get 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Let's proceed to step 7:
The number 80 fits into 630 7 times, leaving a remainder of 70.
The number 7 becomes the next digit in our result. 
Result so far: 1926.7
Deduct 560 from 630 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 8:
80 can be fit into 700 8 times, resulting in a remainder of 60.
Write down 8 as next digit of the result. 
Result so far: 1926.78
Subtracting 640 from 700 leaves us 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.

Going ahead to step 9:
The number 80 fits into 600 7 times, leaving a remainder of 40.
Record the quotient 7 as the next digit in the result. 
Result so far: 1926.787
Deduct 560 from 600 and we're left with 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 10:
400 divided by 80 is 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 1926.7875
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.

On to step 11:
When dividing 0 by 80, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 1926.7875
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.

Advancing to step 12:
80 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 1926.7875
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 outcome is 1926.7875, with a leftover of 0.0.