We look at the division of 12446543 by 15 
We want to figure out the number of times 12446543 can be divided by 15.

Advancing to step 1:
15 goes into 1 0 times with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 15

Going ahead to step 2:
12 divided by 15 is 0 with a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 12 to get 12.
Append the next digit (4) from the dividend to 12 and continue with: 124 / 15

Going ahead to step 3:
If we divide 124 by 15, we get 8 and a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Deduct 120 from 124 and we're left with 4.
Fetch the next digit (4) from the dividend, attach it to 4 and continue: 44 / 15

Moving on to step 4:
When dividing 44 by 15, we get 2 with a remainder of 14.
Use 2 as the next digit of our solution. 
Result so far: 82.0
Subtract 30 from 44 to get 14.
Bring next digit (6) of the dividend behind the 14 and repeat the process: 146 / 15

Let's proceed to step 5:
15 can be fit into 146 9 times, resulting in a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 829.0
Deduct 135 from 146 and we're left with 11.
Bring next digit (5) of the dividend behind the 11 and repeat the process: 115 / 15

Going ahead to step 6:
When dividing 115 by 15, we get 7 with a remainder of 10.
Write down 7 as next digit of the result. 
Result so far: 8297.0
Deduct 105 from 115 and we're left with 10.
Append the next digit (4) from the dividend to 10 and continue with: 104 / 15

On to step 7:
The number 15 fits into 104 6 times, leaving a remainder of 14.
The next digit of our result is 6. 
Result so far: 82976.0
If we take 90 away from 104, we end up with 14.
Take the next digit (3) from the dividend and append it to 14, then repeat: 143 / 15

Advancing to step 8:
When dividing 143 by 15, we get 9 with a remainder of 8.
The number 9 becomes the next digit in our result. 
Result so far: 829769.0
The remainder is 8 after subtracting 135 from 143.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 9:
80 divided by 15 is 5 with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 829769.5
If we subtract 75 from 80, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 10:
50 divided by 15 is 3 with a remainder of 5.
Write down 3 as next digit of the result. 
Result so far: 829769.53
Deduct 45 from 50 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 11:
The number 15 fits into 50 3 times, leaving a remainder of 5.
Use 3 as the next digit of our solution. 
Result so far: 829769.533
Subtract 45 from 50 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The final outcome is 829769.533, with a leftover of 0.0005.