514951 divided by 12 
We want to figure out the number of times 514951 can be divided by 12.

Step 1:
The number 12 fits into 5 0 times, leaving a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 12

Step 2:
If we divide 51 by 12, we get 4 and a remainder of 3.
Write down 4 as next digit of the result. 
Result so far: 4.0
If we take 48 away from 51, we end up with 3.
Grab the next digit (4) from the dividend, add it to 3, then carry on: 34 / 12

On to step 3:
12 goes into 34 2 times with a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 42.0
Deduct 24 from 34 and we're left with 10.
Bring next digit (9) of the dividend behind the 10 and repeat the process: 109 / 12

On to step 4:
109 divided by 12 is 9 with a remainder of 1.
The next digit of our result is 9. 
Result so far: 429.0
Subtracting 108 from 109 leaves us with 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 12

Going ahead to step 5:
If we divide 15 by 12, we get 1 and a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 4291.0
If we subtract 12 from 15, we get 3.
Bring next digit (1) of the dividend behind the 3 and repeat the process: 31 / 12

On to step 6:
When dividing 31 by 12, we get 2 with a remainder of 7.
The number 2 becomes the next digit in our result. 
Result so far: 42912.0
Deduct 24 from 31 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 7:
70 divided by 12 is 5 with a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 42912.5
Subtract 60 from 70 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 8:
When dividing 100 by 12, we get 8 with a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 42912.58
Subtract 96 from 100 to get 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 9:
If we divide 40 by 12, we get 3 and a remainder of 4.
The number 3 becomes the next digit in our result. 
Result so far: 42912.583
If we subtract 36 from 40, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 10:
12 can be fit into 40 3 times, resulting in a remainder of 4.
The number 3 becomes the next digit in our result. 
Result so far: 42912.5833
If we take 36 away from 40, we end up 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.

The final outcome is 42912.5833, with a leftover of 4e-05.