12901212 ÷ 144 
Let's see how many times 144 fits into 12901212.

Let's proceed to step 1:
The number 144 fits into 1 0 times, leaving a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 144

Step 2:
144 goes into 12 0 times with a remainder of 12.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 12, we end up with 12.
Take the next digit (9) from the dividend and append it to 12, then repeat: 129 / 144

Advancing to step 3:
129 divided by 144 is 0 with a remainder of 129.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 129 after subtracting 0 from 129.
Append the next digit (0) from the dividend to 129 and continue with: 1290 / 144

Going ahead to step 4:
If we divide 1290 by 144, we get 8 and a remainder of 138.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Subtract 1152 from 1290 to get 138.
Bring next digit (1) of the dividend behind the 138 and repeat the process: 1381 / 144

On to step 5:
1381 divided by 144 is 9 with a remainder of 85.
Use 9 as the next digit of our solution. 
Result so far: 89.0
If we take 1296 away from 1381, we end up with 85.
Fetch the next digit (2) from the dividend, attach it to 85 and continue: 852 / 144

Moving on to step 6:
852 divided by 144 is 5 with a remainder of 132.
Put 5 as the next digit of the answer. 
Result so far: 895.0
If we subtract 720 from 852, we get 132.
Append the next digit (1) from the dividend to 132 and continue with: 1321 / 144

Moving on to step 7:
1321 divided by 144 is 9 with a remainder of 25.
Put 9 as the next digit of the answer. 
Result so far: 8959.0
The remainder is 25 after subtracting 1296 from 1321.
Append the next digit (2) from the dividend to 25 and continue with: 252 / 144

Going ahead to step 8:
144 goes into 252 1 times with a remainder of 108.
Put 1 as the next digit of the answer. 
Result so far: 89591.0
Deduct 144 from 252 and we're left with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Going ahead to step 9:
If we divide 1080 by 144, we get 7 and a remainder of 72.
Put 7 as the next digit of the answer. 
Result so far: 89591.7
If we take 1008 away from 1080, we end up with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Let's proceed to step 10:
144 goes into 720 5 times with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 89591.75
Subtracting 720 from 720 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 11:
When dividing 0 by 144, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 89591.75
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.

On to step 12:
If we divide 0 by 144, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 89591.75
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.

The final result is 89591.75 with a remainder of 0.0.