We look at the division of 121737 by 12 
We want to divide 121737 by 12.

On to step 1:
When dividing 1 by 12, we get 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 12

On to step 2:
If we divide 12 by 12, we get 1 and a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
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 / 12

Step 3:
12 goes into 1 0 times with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Subtracting 0 from 1 leaves us with 1.
Include the next digit (7) from the dividend after 1, then repeat: 17 / 12

On to step 4:
12 can be fit into 17 1 times, resulting in a remainder of 5.
Write down 1 as next digit of the result. 
Result so far: 101.0
The remainder is 5 after subtracting 12 from 17.
Append the next digit (3) from the dividend to 5 and continue with: 53 / 12

Step 5:
53 divided by 12 is 4 with a remainder of 5.
Record the quotient 4 as the next digit in the result. 
Result so far: 1014.0
If we take 48 away from 53, we end up with 5.
Bring next digit (7) of the dividend behind the 5 and repeat the process: 57 / 12

Advancing to step 6:
12 can be fit into 57 4 times, resulting in a remainder of 9.
Put 4 as the next digit of the answer. 
Result so far: 10144.0
Subtract 48 from 57 to get 9.
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:
The number 12 fits into 90 7 times, leaving a remainder of 6.
The number 7 becomes the next digit in our result. 
Result so far: 10144.7
Deduct 84 from 90 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 8:
60 divided by 12 is 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 10144.75
Subtracting 60 from 60 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.

Let's proceed to step 9:
12 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 10144.75
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.

Going ahead to step 10:
The number 12 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 10144.75
If we take 0 away from 0, we end up 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.

Our division results in 10144.75 with a remaining 0.0.