Let's divide 30123100 by 120
Our goal is to divide 30123100 by 120.

Going ahead to step 1:
If we divide 3 by 120, we get 0 and a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 120

On to step 2:
120 goes into 30 0 times with a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 30 leaves us with 30.
Append the next digit (1) from the dividend to 30 and continue with: 301 / 120

Advancing to step 3:
The number 120 fits into 301 2 times, leaving a remainder of 61.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtract 240 from 301 to get 61.
Append the next digit (2) from the dividend to 61 and continue with: 612 / 120

Moving on to step 4:
612 divided by 120 is 5 with a remainder of 12.
Put 5 as the next digit of the answer. 
Result so far: 25.0
Subtracting 600 from 612 leaves us with 12.
Fetch the next digit (3) from the dividend, attach it to 12 and continue: 123 / 120

Let's proceed to step 5:
120 goes into 123 1 times with a remainder of 3.
Write down 1 as next digit of the result. 
Result so far: 251.0
The remainder is 3 after subtracting 120 from 123.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 120

On to step 6:
When dividing 31 by 120, we get 0 with a remainder of 31.
Record the quotient 0 as the next digit in the result. 
Result so far: 2510.0
If we subtract 0 from 31, we get 31.
Fetch the next digit (0) from the dividend, attach it to 31 and continue: 310 / 120

Moving on to step 7:
120 can be fit into 310 2 times, resulting in a remainder of 70.
Record the quotient 2 as the next digit in the result. 
Result so far: 25102.0
Deduct 240 from 310 and we're left with 70.
Bring next digit (0) of the dividend behind the 70 and repeat the process: 700 / 120

Advancing to step 8:
700 divided by 120 is 5 with a remainder of 100.
Use 5 as the next digit of our solution. 
Result so far: 251025.0
The remainder is 100 after subtracting 600 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Moving on to step 9:
When dividing 1000 by 120, we get 8 with a remainder of 40.
The next digit of our result is 8. 
Result so far: 251025.8
If we take 960 away from 1000, we end up 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.

On to step 10:
The number 120 fits into 400 3 times, leaving a remainder of 40.
Use 3 as the next digit of our solution. 
Result so far: 251025.83
If we subtract 360 from 400, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 11:
400 divided by 120 is 3 with a remainder of 40.
The next digit of our result is 3. 
Result so far: 251025.833
If we take 360 away from 400, we end up 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.

In conclusion, the division gives 251025.833 with a balance of 0.004.