815459 ÷ 12 
We're looking to find how many times 12 goes into 815459.

On to step 1:
8 divided by 12 is 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 12

On to step 2:
When dividing 81 by 12, we get 6 with a remainder of 9.
Write down 6 as next digit of the result. 
Result so far: 6.0
The remainder is 9 after subtracting 72 from 81.
Take the next digit (5) from the dividend and append it to 9, then repeat: 95 / 12

Let's proceed to step 3:
When dividing 95 by 12, we get 7 with a remainder of 11.
Record the quotient 7 as the next digit in the result. 
Result so far: 67.0
Subtracting 84 from 95 leaves us with 11.
Fetch the next digit (4) from the dividend, attach it to 11 and continue: 114 / 12

On to step 4:
When dividing 114 by 12, we get 9 with a remainder of 6.
Record the quotient 9 as the next digit in the result. 
Result so far: 679.0
If we take 108 away from 114, we end up with 6.
Append the next digit (5) from the dividend to 6 and continue with: 65 / 12

Let's proceed to step 5:
When dividing 65 by 12, we get 5 with a remainder of 5.
The next digit of our result is 5. 
Result so far: 6795.0
Subtract 60 from 65 to get 5.
Append the next digit (9) from the dividend to 5 and continue with: 59 / 12

Let's proceed to step 6:
12 can be fit into 59 4 times, resulting in a remainder of 11.
Record the quotient 4 as the next digit in the result. 
Result so far: 67954.0
Deduct 48 from 59 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 7:
The number 12 fits into 110 9 times, leaving a remainder of 2.
The number 9 becomes the next digit in our result. 
Result so far: 67954.9
Deduct 108 from 110 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 8:
If we divide 20 by 12, we get 1 and a remainder of 8.
Record the quotient 1 as the next digit in the result. 
Result so far: 67954.91
If we take 12 away from 20, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 9:
80 divided by 12 is 6 with a remainder of 8.
Put 6 as the next digit of the answer. 
Result so far: 67954.916
The remainder is 8 after subtracting 72 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 10:
12 goes into 80 6 times with a remainder of 8.
The next digit of our result is 6. 
Result so far: 67954.9166
Deduct 72 from 80 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

After the division, we end up with 67954.9166 and a remainder of 8e-05.