We look at the division of 73644442 by 45 
We want to figure out the number of times 73644442 can be divided by 45.

Step 1:
The number 45 fits into 7 0 times, leaving a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Bring next digit (3) of the dividend behind the 7 and repeat the process: 73 / 45

Let's proceed to step 2:
73 divided by 45 is 1 with a remainder of 28.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 45 from 73 to get 28.
Fetch the next digit (6) from the dividend, attach it to 28 and continue: 286 / 45

Step 3:
The number 45 fits into 286 6 times, leaving a remainder of 16.
Put 6 as the next digit of the answer. 
Result so far: 16.0
Subtract 270 from 286 to get 16.
Append the next digit (4) from the dividend to 16 and continue with: 164 / 45

Advancing to step 4:
164 divided by 45 is 3 with a remainder of 29.
The number 3 becomes the next digit in our result. 
Result so far: 163.0
The remainder is 29 after subtracting 135 from 164.
Grab the next digit (4) from the dividend, add it to 29, then carry on: 294 / 45

Let's proceed to step 5:
294 divided by 45 is 6 with a remainder of 24.
Put 6 as the next digit of the answer. 
Result so far: 1636.0
If we take 270 away from 294, we end up with 24.
Append the next digit (4) from the dividend to 24 and continue with: 244 / 45

Going ahead to step 6:
When dividing 244 by 45, we get 5 with a remainder of 19.
The next digit of our result is 5. 
Result so far: 16365.0
The remainder is 19 after subtracting 225 from 244.
Include the next digit (4) from the dividend after 19, then repeat: 194 / 45

Moving on to step 7:
If we divide 194 by 45, we get 4 and a remainder of 14.
The number 4 becomes the next digit in our result. 
Result so far: 163654.0
Subtracting 180 from 194 leaves us with 14.
Grab the next digit (2) from the dividend, add it to 14, then carry on: 142 / 45

On to step 8:
142 divided by 45 is 3 with a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 1636543.0
Subtract 135 from 142 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 9:
When dividing 70 by 45, we get 1 with a remainder of 25.
The next digit of our result is 1. 
Result so far: 1636543.1
If we subtract 45 from 70, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Moving on to step 10:
When dividing 250 by 45, we get 5 with a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 1636543.15
The remainder is 25 after subtracting 225 from 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 11:
45 can be fit into 250 5 times, resulting in a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 1636543.155
If we take 225 away from 250, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

After the division, we end up with 1636543.155 and a remainder of 0.0025.