We divide 12369139 by 864
Our goal is to divide 12369139 by 864.

Moving on to step 1:
864 goes into 1 0 times with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 864

Moving on to step 2:
864 goes into 12 0 times with a remainder of 12.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 12 leaves us with 12.
Bring next digit (3) of the dividend behind the 12 and repeat the process: 123 / 864

Moving on to step 3:
864 can be fit into 123 0 times, resulting in a remainder of 123.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 123 to get 123.
Take the next digit (6) from the dividend and append it to 123, then repeat: 1236 / 864

Step 4:
864 goes into 1236 1 times with a remainder of 372.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 864 from 1236 and we're left with 372.
Take the next digit (9) from the dividend and append it to 372, then repeat: 3729 / 864

Moving on to step 5:
864 goes into 3729 4 times with a remainder of 273.
Put 4 as the next digit of the answer. 
Result so far: 14.0
Deduct 3456 from 3729 and we're left with 273.
Grab the next digit (1) from the dividend, add it to 273, then carry on: 2731 / 864

Let's proceed to step 6:
2731 divided by 864 is 3 with a remainder of 139.
Put 3 as the next digit of the answer. 
Result so far: 143.0
Subtract 2592 from 2731 to get 139.
Fetch the next digit (3) from the dividend, attach it to 139 and continue: 1393 / 864

On to step 7:
864 can be fit into 1393 1 times, resulting in a remainder of 529.
The next digit of our result is 1. 
Result so far: 1431.0
The remainder is 529 after subtracting 864 from 1393.
Grab the next digit (9) from the dividend, add it to 529, then carry on: 5299 / 864

Going ahead to step 8:
If we divide 5299 by 864, we get 6 and a remainder of 115.
Use 6 as the next digit of our solution. 
Result so far: 14316.0
The remainder is 115 after subtracting 5184 from 5299.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

Going ahead to step 9:
864 goes into 1150 1 times with a remainder of 286.
Put 1 as the next digit of the answer. 
Result so far: 14316.1
Deduct 864 from 1150 and we're left with 286.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2860, and continue the process.

Advancing to step 10:
864 goes into 2860 3 times with a remainder of 268.
Use 3 as the next digit of our solution. 
Result so far: 14316.13
The remainder is 268 after subtracting 2592 from 2860.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2680, and continue the process.

Step 11:
The number 864 fits into 2680 3 times, leaving a remainder of 88.
Put 3 as the next digit of the answer. 
Result so far: 14316.133
Subtracting 2592 from 2680 leaves us with 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Our division results in 14316.133 with a remaining 0.0088.