Let's divide 12491884 by 864
Let's see how many times 864 fits into 12491884.

Moving on to step 1:
864 can be fit into 1 0 times, resulting in a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 864

Let's proceed to step 2:
The number 864 fits into 12 0 times, leaving a remainder of 12.
The number 0 becomes the next digit in our 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 / 864

Let's proceed to step 3:
The number 864 fits into 124 0 times, leaving a remainder of 124.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 124 after subtracting 0 from 124.
Grab the next digit (9) from the dividend, add it to 124, then carry on: 1249 / 864

Going ahead to step 4:
If we divide 1249 by 864, we get 1 and a remainder of 385.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 385 after subtracting 864 from 1249.
Take the next digit (1) from the dividend and append it to 385, then repeat: 3851 / 864

Moving on to step 5:
If we divide 3851 by 864, we get 4 and a remainder of 395.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
Subtract 3456 from 3851 to get 395.
Fetch the next digit (8) from the dividend, attach it to 395 and continue: 3958 / 864

Advancing to step 6:
The number 864 fits into 3958 4 times, leaving a remainder of 502.
Put 4 as the next digit of the answer. 
Result so far: 144.0
Subtracting 3456 from 3958 leaves us with 502.
Fetch the next digit (8) from the dividend, attach it to 502 and continue: 5028 / 864

Going ahead to step 7:
The number 864 fits into 5028 5 times, leaving a remainder of 708.
Put 5 as the next digit of the answer. 
Result so far: 1445.0
Subtracting 4320 from 5028 leaves us with 708.
Take the next digit (4) from the dividend and append it to 708, then repeat: 7084 / 864

Moving on to step 8:
7084 divided by 864 is 8 with a remainder of 172.
The number 8 becomes the next digit in our result. 
Result so far: 14458.0
The remainder is 172 after subtracting 6912 from 7084.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

Advancing to step 9:
864 goes into 1720 1 times with a remainder of 856.
Put 1 as the next digit of the answer. 
Result so far: 14458.1
Deduct 864 from 1720 and we're left with 856.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8560, and continue the process.

Moving on to step 10:
When dividing 8560 by 864, we get 9 with a remainder of 784.
The number 9 becomes the next digit in our result. 
Result so far: 14458.19
If we take 7776 away from 8560, we end up with 784.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7840, and continue the process.

Going ahead to step 11:
If we divide 7840 by 864, we get 9 and a remainder of 64.
The next digit of our result is 9. 
Result so far: 14458.199
Deduct 7776 from 7840 and we're left with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

The quotient of the division is 14458.199, and the remainder is 0.0064.