18245898 ÷ 864 
Our goal is to divide 18245898 by 864.

On to step 1:
The number 864 fits into 1 0 times, leaving 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.
Grab the next digit (8) from the dividend, add it to 1, then carry on: 18 / 864

Moving on to step 2:
864 goes into 18 0 times with a remainder of 18.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 18 leaves us with 18.
Include the next digit (2) from the dividend after 18, then repeat: 182 / 864

Step 3:
182 divided by 864 is 0 with a remainder of 182.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 182 and we're left with 182.
Append the next digit (4) from the dividend to 182 and continue with: 1824 / 864

Going ahead to step 4:
864 goes into 1824 2 times with a remainder of 96.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 1728 from 1824 and we're left with 96.
Fetch the next digit (5) from the dividend, attach it to 96 and continue: 965 / 864

On to step 5:
If we divide 965 by 864, we get 1 and a remainder of 101.
Put 1 as the next digit of the answer. 
Result so far: 21.0
If we take 864 away from 965, we end up with 101.
Bring next digit (8) of the dividend behind the 101 and repeat the process: 1018 / 864

Step 6:
If we divide 1018 by 864, we get 1 and a remainder of 154.
The next digit of our result is 1. 
Result so far: 211.0
Subtracting 864 from 1018 leaves us with 154.
Bring next digit (9) of the dividend behind the 154 and repeat the process: 1549 / 864

Let's proceed to step 7:
When dividing 1549 by 864, we get 1 with a remainder of 685.
Record the quotient 1 as the next digit in the result. 
Result so far: 2111.0
Subtract 864 from 1549 to get 685.
Bring next digit (8) of the dividend behind the 685 and repeat the process: 6858 / 864

Moving on to step 8:
864 can be fit into 6858 7 times, resulting in a remainder of 810.
Write down 7 as next digit of the result. 
Result so far: 21117.0
If we subtract 6048 from 6858, we get 810.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8100, and continue the process.

Going ahead to step 9:
When dividing 8100 by 864, we get 9 with a remainder of 324.
Record the quotient 9 as the next digit in the result. 
Result so far: 21117.9
If we subtract 7776 from 8100, we get 324.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3240, and continue the process.

Advancing to step 10:
When dividing 3240 by 864, we get 3 with a remainder of 648.
Record the quotient 3 as the next digit in the result. 
Result so far: 21117.93
Deduct 2592 from 3240 and we're left with 648.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6480, and continue the process.

Going ahead to step 11:
When dividing 6480 by 864, we get 7 with a remainder of 432.
Use 7 as the next digit of our solution. 
Result so far: 21117.937
Subtracting 6048 from 6480 leaves us with 432.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

Going ahead to step 12:
If we divide 4320 by 864, we get 5 and a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 21117.9375
Subtracting 4320 from 4320 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 13:
The number 864 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 21117.9375
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 14:
The number 864 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 21117.9375
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 21117.9375, with a leftover of 0.0.