Let's divide 80139 by 66
We're looking to find how many times 66 goes into 80139.

Going ahead to step 1:
8 divided by 66 is 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 66

Let's proceed to step 2:
66 can be fit into 80 1 times, resulting in a remainder of 14.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 14 after subtracting 66 from 80.
Grab the next digit (1) from the dividend, add it to 14, then carry on: 141 / 66

Going ahead to step 3:
If we divide 141 by 66, we get 2 and a remainder of 9.
Use 2 as the next digit of our solution. 
Result so far: 12.0
Subtracting 132 from 141 leaves us with 9.
Bring next digit (3) of the dividend behind the 9 and repeat the process: 93 / 66

Going ahead to step 4:
66 goes into 93 1 times with a remainder of 27.
Use 1 as the next digit of our solution. 
Result so far: 121.0
Subtract 66 from 93 to get 27.
Bring next digit (9) of the dividend behind the 27 and repeat the process: 279 / 66

Let's proceed to step 5:
279 divided by 66 is 4 with a remainder of 15.
Write down 4 as next digit of the result. 
Result so far: 1214.0
Subtract 264 from 279 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 6:
150 divided by 66 is 2 with a remainder of 18.
Put 2 as the next digit of the answer. 
Result so far: 1214.2
Deduct 132 from 150 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 7:
66 goes into 180 2 times with a remainder of 48.
Put 2 as the next digit of the answer. 
Result so far: 1214.22
Deduct 132 from 180 and we're left with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

In conclusion, the division gives 1214.22 with a balance of 0.048.