We're dividing 72644570 by 18 
Our goal is to divide 72644570 by 18.

Advancing to step 1:
18 goes into 7 0 times with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Bring next digit (2) of the dividend behind the 7 and repeat the process: 72 / 18

Step 2:
If we divide 72 by 18, we get 4 and a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 4.0
The remainder is 0 after subtracting 72 from 72.
Append the next digit (6) from the dividend to 0 and continue with: 6 / 18

On to step 3:
18 can be fit into 6 0 times, resulting in a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 40.0
If we take 0 away from 6, we end up with 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 18

Moving on to step 4:
18 can be fit into 64 3 times, resulting in a remainder of 10.
Put 3 as the next digit of the answer. 
Result so far: 403.0
Subtracting 54 from 64 leaves us with 10.
Fetch the next digit (4) from the dividend, attach it to 10 and continue: 104 / 18

Advancing to step 5:
18 goes into 104 5 times with a remainder of 14.
The next digit of our result is 5. 
Result so far: 4035.0
The remainder is 14 after subtracting 90 from 104.
Include the next digit (5) from the dividend after 14, then repeat: 145 / 18

Going ahead to step 6:
18 goes into 145 8 times with a remainder of 1.
The next digit of our result is 8. 
Result so far: 40358.0
If we subtract 144 from 145, we get 1.
Include the next digit (7) from the dividend after 1, then repeat: 17 / 18

Going ahead to step 7:
The number 18 fits into 17 0 times, leaving a remainder of 17.
The next digit of our result is 0. 
Result so far: 403580.0
If we take 0 away from 17, we end up with 17.
Take the next digit (0) from the dividend and append it to 17, then repeat: 170 / 18

Going ahead to step 8:
170 divided by 18 is 9 with a remainder of 8.
Put 9 as the next digit of the answer. 
Result so far: 4035809.0
If we subtract 162 from 170, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 9:
18 can be fit into 80 4 times, resulting in a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 4035809.4
Subtract 72 from 80 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 10:
18 can be fit into 80 4 times, resulting in a remainder of 8.
Write down 4 as next digit of the result. 
Result so far: 4035809.44
Subtracting 72 from 80 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final result is 4035809.44 with a remainder of 0.008.