We divide 25369890 by 18
Let's see how many times 18 fits into 25369890.

Step 1:
18 can be fit into 2 0 times, resulting in a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Grab the next digit (5) from the dividend, add it to 2, then carry on: 25 / 18

Let's proceed to step 2:
18 can be fit into 25 1 times, resulting in a remainder of 7.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 18 from 25 leaves us with 7.
Include the next digit (3) from the dividend after 7, then repeat: 73 / 18

Let's proceed to step 3:
18 can be fit into 73 4 times, resulting in a remainder of 1.
The next digit of our result is 4. 
Result so far: 14.0
Subtracting 72 from 73 leaves us with 1.
Grab the next digit (6) from the dividend, add it to 1, then carry on: 16 / 18

Moving on to step 4:
When dividing 16 by 18, we get 0 with a remainder of 16.
The number 0 becomes the next digit in our result. 
Result so far: 140.0
If we subtract 0 from 16, we get 16.
Bring next digit (9) of the dividend behind the 16 and repeat the process: 169 / 18

Advancing to step 5:
18 can be fit into 169 9 times, resulting in a remainder of 7.
Record the quotient 9 as the next digit in the result. 
Result so far: 1409.0
If we take 162 away from 169, we end up with 7.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 18

Going ahead to step 6:
18 can be fit into 78 4 times, resulting in a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 14094.0
If we take 72 away from 78, we end up with 6.
Fetch the next digit (9) from the dividend, attach it to 6 and continue: 69 / 18

Step 7:
69 divided by 18 is 3 with a remainder of 15.
Record the quotient 3 as the next digit in the result. 
Result so far: 140943.0
Subtracting 54 from 69 leaves us with 15.
Append the next digit (0) from the dividend to 15 and continue with: 150 / 18

Advancing to step 8:
If we divide 150 by 18, we get 8 and a remainder of 6.
Write down 8 as next digit of the result. 
Result so far: 1409438.0
If we take 144 away from 150, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 9:
When dividing 60 by 18, we get 3 with a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 1409438.3
The remainder is 6 after subtracting 54 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 10:
18 can be fit into 60 3 times, resulting in a remainder of 6.
The next digit of our result is 3. 
Result so far: 1409438.33
If we take 54 away from 60, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

The final result is 1409438.33 with a remainder of 0.006.