We divide 615312 by 12
We want to figure out the number of times 615312 can be divided by 12.

Advancing to step 1:
The number 12 fits into 6 0 times, leaving a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Grab the next digit (1) from the dividend, add it to 6, then carry on: 61 / 12

Advancing to step 2:
12 can be fit into 61 5 times, resulting in a remainder of 1.
Put 5 as the next digit of the answer. 
Result so far: 5.0
The remainder is 1 after subtracting 60 from 61.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 12

Moving on to step 3:
12 can be fit into 15 1 times, resulting in a remainder of 3.
The next digit of our result is 1. 
Result so far: 51.0
Subtracting 12 from 15 leaves us with 3.
Include the next digit (3) from the dividend after 3, then repeat: 33 / 12

Going ahead to step 4:
If we divide 33 by 12, we get 2 and a remainder of 9.
Write down 2 as next digit of the result. 
Result so far: 512.0
If we take 24 away from 33, we end up with 9.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 12

Advancing to step 5:
12 goes into 91 7 times with a remainder of 7.
Put 7 as the next digit of the answer. 
Result so far: 5127.0
Subtract 84 from 91 to get 7.
Bring next digit (2) of the dividend behind the 7 and repeat the process: 72 / 12

On to step 6:
If we divide 72 by 12, we get 6 and a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 51276.0
Subtract 72 from 72 to 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.

Advancing to step 7:
0 divided by 12 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 51276.0
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.

Advancing to step 8:
If we divide 0 by 12, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 51276.0
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.

The final outcome is 51276.0, with a leftover of 0.0.