We divide 73644521 by 18
We want to figure out the number of times 73644521 can be divided by 18.

Step 1:
18 can be fit into 7 0 times, resulting in a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Include the next digit (3) from the dividend after 7, then repeat: 73 / 18

On to step 2:
18 can be fit into 73 4 times, resulting in a remainder of 1.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we subtract 72 from 73, we get 1.
Take the next digit (6) from the dividend and append it to 1, then repeat: 16 / 18

Going ahead to step 3:
16 divided by 18 is 0 with a remainder of 16.
Write down 0 as next digit of the result. 
Result so far: 40.0
If we take 0 away from 16, we end up with 16.
Include the next digit (4) from the dividend after 16, then repeat: 164 / 18

On to step 4:
If we divide 164 by 18, we get 9 and a remainder of 2.
The next digit of our result is 9. 
Result so far: 409.0
If we subtract 162 from 164, we get 2.
Fetch the next digit (4) from the dividend, attach it to 2 and continue: 24 / 18

On to step 5:
18 goes into 24 1 times with a remainder of 6.
Use 1 as the next digit of our solution. 
Result so far: 4091.0
If we subtract 18 from 24, we get 6.
Include the next digit (5) from the dividend after 6, then repeat: 65 / 18

Going ahead to step 6:
If we divide 65 by 18, we get 3 and a remainder of 11.
Use 3 as the next digit of our solution. 
Result so far: 40913.0
Subtract 54 from 65 to get 11.
Include the next digit (2) from the dividend after 11, then repeat: 112 / 18

On to step 7:
112 divided by 18 is 6 with a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 409136.0
If we take 108 away from 112, we end up with 4.
Include the next digit (1) from the dividend after 4, then repeat: 41 / 18

Going ahead to step 8:
If we divide 41 by 18, we get 2 and a remainder of 5.
Record the quotient 2 as the next digit in the result. 
Result so far: 4091362.0
The remainder is 5 after subtracting 36 from 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 9:
50 divided by 18 is 2 with a remainder of 14.
The next digit of our result is 2. 
Result so far: 4091362.2
The remainder is 14 after subtracting 36 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 10:
When dividing 140 by 18, we get 7 with a remainder of 14.
The next digit of our result is 7. 
Result so far: 4091362.27
If we take 126 away from 140, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 11:
18 goes into 140 7 times with a remainder of 14.
The number 7 becomes the next digit in our result. 
Result so far: 4091362.277
Subtract 126 from 140 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

In conclusion, the division gives 4091362.277 with a balance of 0.0014.