We look at the division of 104139 by 90 
Our goal is to divide 104139 by 90.

Moving on to step 1:
When dividing 1 by 90, we get 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Append the next digit (0) from the dividend to 1 and continue with: 10 / 90

On to step 2:
90 can be fit into 10 0 times, resulting in a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 10 and we're left with 10.
Fetch the next digit (4) from the dividend, attach it to 10 and continue: 104 / 90

Moving on to step 3:
90 can be fit into 104 1 times, resulting in a remainder of 14.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 90 from 104 leaves us with 14.
Take the next digit (1) from the dividend and append it to 14, then repeat: 141 / 90

Let's proceed to step 4:
When dividing 141 by 90, we get 1 with a remainder of 51.
Put 1 as the next digit of the answer. 
Result so far: 11.0
Subtracting 90 from 141 leaves us with 51.
Append the next digit (3) from the dividend to 51 and continue with: 513 / 90

Let's proceed to step 5:
90 goes into 513 5 times with a remainder of 63.
Use 5 as the next digit of our solution. 
Result so far: 115.0
If we subtract 450 from 513, we get 63.
Grab the next digit (9) from the dividend, add it to 63, then carry on: 639 / 90

Advancing to step 6:
The number 90 fits into 639 7 times, leaving a remainder of 9.
Write down 7 as next digit of the result. 
Result so far: 1157.0
The remainder is 9 after subtracting 630 from 639.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 7:
When dividing 90 by 90, we get 1 with a remainder of 0.
The next digit of our result is 1. 
Result so far: 1157.1
The remainder is 0 after subtracting 90 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
0 divided by 90 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 1157.1
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 9:
If we divide 0 by 90, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 1157.1
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.

In conclusion, the division gives 1157.1 with a balance of 0.0.