151420 ÷ 12 
We want to divide 151420 by 12.

Moving on to step 1:
When dividing 1 by 12, we get 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Grab the next digit (5) from the dividend, add it to 1, then carry on: 15 / 12

Let's proceed to step 2:
15 divided by 12 is 1 with a remainder of 3.
The next digit of our result is 1. 
Result so far: 1.0
If we take 12 away from 15, we end up with 3.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 12

On to step 3:
31 divided by 12 is 2 with a remainder of 7.
Write down 2 as next digit of the result. 
Result so far: 12.0
Deduct 24 from 31 and we're left with 7.
Take the next digit (4) from the dividend and append it to 7, then repeat: 74 / 12

Step 4:
The number 12 fits into 74 6 times, leaving a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 126.0
The remainder is 2 after subtracting 72 from 74.
Take the next digit (2) from the dividend and append it to 2, then repeat: 22 / 12

On to step 5:
22 divided by 12 is 1 with a remainder of 10.
Put 1 as the next digit of the answer. 
Result so far: 1261.0
If we take 12 away from 22, we end up with 10.
Take the next digit (0) from the dividend and append it to 10, then repeat: 100 / 12

Step 6:
When dividing 100 by 12, we get 8 with a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 12618.0
Deduct 96 from 100 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 7:
12 can be fit into 40 3 times, resulting in a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 12618.3
Deduct 36 from 40 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 8:
If we divide 40 by 12, we get 3 and a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 12618.33
The remainder is 4 after subtracting 36 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

In conclusion, the division gives 12618.33 with a balance of 0.004.