We're dividing 121918 by 4 
We're looking to find how many times 4 goes into 121918.

Going ahead to step 1:
1 divided by 4 is 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 4

Step 2:
12 divided by 4 is 3 with a remainder of 0.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Deduct 12 from 12 and we're left with 0.
Bring next digit (1) of the dividend behind the 0 and repeat the process: 1 / 4

Moving on to step 3:
If we divide 1 by 4, we get 0 and a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 30.0
Deduct 0 from 1 and we're left with 1.
Append the next digit (9) from the dividend to 1 and continue with: 19 / 4

Let's proceed to step 4:
The number 4 fits into 19 4 times, leaving a remainder of 3.
The number 4 becomes the next digit in our result. 
Result so far: 304.0
Deduct 16 from 19 and we're left with 3.
Fetch the next digit (1) from the dividend, attach it to 3 and continue: 31 / 4

On to step 5:
If we divide 31 by 4, we get 7 and a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 3047.0
The remainder is 3 after subtracting 28 from 31.
Take the next digit (8) from the dividend and append it to 3, then repeat: 38 / 4

Advancing to step 6:
When dividing 38 by 4, we get 9 with a remainder of 2.
Record the quotient 9 as the next digit in the result. 
Result so far: 30479.0
The remainder is 2 after subtracting 36 from 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 7:
20 divided by 4 is 5 with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 30479.5
If we subtract 20 from 20, 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.

Step 8:
0 divided by 4 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 30479.5
Subtracting 0 from 0 leaves us 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.

On to step 9:
4 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 30479.5
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 30479.5 with a balance of 0.0.