We divide 121930 by 12
We're looking to find how many times 12 goes into 121930.

On to step 1:
The number 12 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 12

On to step 2:
If we divide 12 by 12, we get 1 and a remainder of 0.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 12 from 12, we get 0.
Take the next digit (1) from the dividend and append it to 0, then repeat: 1 / 12

On to step 3:
12 can be fit into 1 0 times, resulting in a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
The remainder is 1 after subtracting 0 from 1.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 12

Advancing to step 4:
12 goes into 19 1 times with a remainder of 7.
The number 1 becomes the next digit in our result. 
Result so far: 101.0
Deduct 12 from 19 and we're left with 7.
Append the next digit (3) from the dividend to 7 and continue with: 73 / 12

Moving on to step 5:
12 can be fit into 73 6 times, resulting in a remainder of 1.
Write down 6 as next digit of the result. 
Result so far: 1016.0
Subtracting 72 from 73 leaves us with 1.
Fetch the next digit (0) from the dividend, attach it to 1 and continue: 10 / 12

On to step 6:
The number 12 fits into 10 0 times, leaving a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 10160.0
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 7:
When dividing 100 by 12, we get 8 with a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 10160.8
Deduct 96 from 100 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 8:
12 can be fit into 40 3 times, resulting in a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 10160.83
Subtracting 36 from 40 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 9:
12 can be fit into 40 3 times, resulting in a remainder of 4.
Write down 3 as next digit of the result. 
Result so far: 10160.833
Deduct 36 from 40 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

In conclusion, the division gives 10160.833 with a balance of 0.0004.