We look at the division of 12156351 by 149 
Our goal is to divide 12156351 by 149.

Advancing to step 1:
If we divide 1 by 149, we get 0 and a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 149

Moving on to step 2:
If we divide 12 by 149, we get 0 and a remainder of 12.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 12 leaves us with 12.
Bring next digit (1) of the dividend behind the 12 and repeat the process: 121 / 149

Advancing to step 3:
149 goes into 121 0 times with a remainder of 121.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 121 and we're left with 121.
Include the next digit (5) from the dividend after 121, then repeat: 1215 / 149

On to step 4:
When dividing 1215 by 149, we get 8 with a remainder of 23.
Write down 8 as next digit of the result. 
Result so far: 8.0
If we take 1192 away from 1215, we end up with 23.
Bring next digit (6) of the dividend behind the 23 and repeat the process: 236 / 149

Moving on to step 5:
236 divided by 149 is 1 with a remainder of 87.
Record the quotient 1 as the next digit in the result. 
Result so far: 81.0
If we take 149 away from 236, we end up with 87.
Bring next digit (3) of the dividend behind the 87 and repeat the process: 873 / 149

Step 6:
The number 149 fits into 873 5 times, leaving a remainder of 128.
Use 5 as the next digit of our solution. 
Result so far: 815.0
If we subtract 745 from 873, we get 128.
Append the next digit (5) from the dividend to 128 and continue with: 1285 / 149

Let's proceed to step 7:
If we divide 1285 by 149, we get 8 and a remainder of 93.
Put 8 as the next digit of the answer. 
Result so far: 8158.0
Subtract 1192 from 1285 to get 93.
Bring next digit (1) of the dividend behind the 93 and repeat the process: 931 / 149

On to step 8:
The number 149 fits into 931 6 times, leaving a remainder of 37.
The number 6 becomes the next digit in our result. 
Result so far: 81586.0
The remainder is 37 after subtracting 894 from 931.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Moving on to step 9:
149 can be fit into 370 2 times, resulting in a remainder of 72.
Write down 2 as next digit of the result. 
Result so far: 81586.2
Subtracting 298 from 370 leaves us 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.

Step 10:
720 divided by 149 is 4 with a remainder of 124.
The number 4 becomes the next digit in our result. 
Result so far: 81586.24
The remainder is 124 after subtracting 596 from 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Let's proceed to step 11:
149 can be fit into 1240 8 times, resulting in a remainder of 48.
The next digit of our result is 8. 
Result so far: 81586.248
Subtracting 1192 from 1240 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Going ahead to step 12:
The number 149 fits into 480 3 times, leaving a remainder of 33.
Put 3 as the next digit of the answer. 
Result so far: 81586.2483
If we subtract 447 from 480, we get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Going ahead to step 13:
When dividing 330 by 149, we get 2 with a remainder of 32.
Write down 2 as next digit of the result. 
Result so far: 81586.24832
If we take 298 away from 330, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 14:
The number 149 fits into 320 2 times, leaving a remainder of 22.
Use 2 as the next digit of our solution. 
Result so far: 81586.248322
If we subtract 298 from 320, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

After the division, we end up with 81586.248322 and a remainder of 2.2e-06.