Let's divide 121988 by 10
Our goal is to divide 121988 by 10.

Going ahead to step 1:
The number 10 fits into 1 0 times, leaving a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 10

Step 2:
The number 10 fits into 12 1 times, leaving a remainder of 2.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 10 from 12 to get 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 10

On to step 3:
The number 10 fits into 21 2 times, leaving a remainder of 1.
Use 2 as the next digit of our solution. 
Result so far: 12.0
If we subtract 20 from 21, we get 1.
Grab the next digit (9) from the dividend, add it to 1, then carry on: 19 / 10

On to step 4:
When dividing 19 by 10, we get 1 with a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 121.0
Deduct 10 from 19 and we're left with 9.
Append the next digit (8) from the dividend to 9 and continue with: 98 / 10

Let's proceed to step 5:
The number 10 fits into 98 9 times, leaving a remainder of 8.
Use 9 as the next digit of our solution. 
Result so far: 1219.0
If we subtract 90 from 98, we get 8.
Fetch the next digit (8) from the dividend, attach it to 8 and continue: 88 / 10

Moving on to step 6:
88 divided by 10 is 8 with a remainder of 8.
Write down 8 as next digit of the result. 
Result so far: 12198.0
The remainder is 8 after subtracting 80 from 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 7:
When dividing 80 by 10, we get 8 with a remainder of 0.
The number 8 becomes the next digit in our result. 
Result so far: 12198.8
If we subtract 80 from 80, 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.

Moving on to step 8:
When dividing 0 by 10, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 12198.8
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.

Going ahead to step 9:
The number 10 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 12198.8
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.

In conclusion, the division gives 12198.8 with a balance of 0.0.