128939 divided by 80 
We want to figure out the number of times 128939 can be divided by 80.

Step 1:
80 can be fit into 1 0 times, resulting in a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 80

Going ahead to step 2:
80 goes into 12 0 times with a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 12 leaves us with 12.
Grab the next digit (8) from the dividend, add it to 12, then carry on: 128 / 80

Advancing to step 3:
80 can be fit into 128 1 times, resulting in a remainder of 48.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 80 from 128 to get 48.
Fetch the next digit (9) from the dividend, attach it to 48 and continue: 489 / 80

Moving on to step 4:
80 can be fit into 489 6 times, resulting in a remainder of 9.
Write down 6 as next digit of the result. 
Result so far: 16.0
If we subtract 480 from 489, we get 9.
Bring next digit (3) of the dividend behind the 9 and repeat the process: 93 / 80

Step 5:
If we divide 93 by 80, we get 1 and a remainder of 13.
Record the quotient 1 as the next digit in the result. 
Result so far: 161.0
The remainder is 13 after subtracting 80 from 93.
Grab the next digit (9) from the dividend, add it to 13, then carry on: 139 / 80

Moving on to step 6:
When dividing 139 by 80, we get 1 with a remainder of 59.
Record the quotient 1 as the next digit in the result. 
Result so far: 1611.0
Subtract 80 from 139 to get 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:
80 goes into 590 7 times with a remainder of 30.
Record the quotient 7 as the next digit in the result. 
Result so far: 1611.7
The remainder is 30 after subtracting 560 from 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 8:
300 divided by 80 is 3 with a remainder of 60.
Put 3 as the next digit of the answer. 
Result so far: 1611.73
The remainder is 60 after subtracting 240 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 9:
80 can be fit into 600 7 times, resulting in a remainder of 40.
Use 7 as the next digit of our solution. 
Result so far: 1611.737
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:
The number 80 fits into 400 5 times, leaving a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 1611.7375
If we take 400 away from 400, 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.

Moving on to step 11:
80 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 1611.7375
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.

Advancing to step 12:
80 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 1611.7375
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.

The quotient of the division is 1611.7375, and the remainder is 0.0.