We look at the division of 722158 by 45 
We want to figure out the number of times 722158 can be divided by 45.

On to step 1:
The number 45 fits into 7 0 times, leaving a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 45

On to step 2:
When dividing 72 by 45, we get 1 with a remainder of 27.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 45 from 72 and we're left with 27.
Include the next digit (2) from the dividend after 27, then repeat: 272 / 45

Moving on to step 3:
45 can be fit into 272 6 times, resulting in a remainder of 2.
Use 6 as the next digit of our solution. 
Result so far: 16.0
The remainder is 2 after subtracting 270 from 272.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 45

Let's proceed to step 4:
If we divide 21 by 45, we get 0 and a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 160.0
The remainder is 21 after subtracting 0 from 21.
Fetch the next digit (5) from the dividend, attach it to 21 and continue: 215 / 45

Advancing to step 5:
215 divided by 45 is 4 with a remainder of 35.
Record the quotient 4 as the next digit in the result. 
Result so far: 1604.0
The remainder is 35 after subtracting 180 from 215.
Take the next digit (8) from the dividend and append it to 35, then repeat: 358 / 45

Moving on to step 6:
The number 45 fits into 358 7 times, leaving a remainder of 43.
Record the quotient 7 as the next digit in the result. 
Result so far: 16047.0
Subtract 315 from 358 to get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Step 7:
If we divide 430 by 45, we get 9 and a remainder of 25.
The number 9 becomes the next digit in our result. 
Result so far: 16047.9
If we subtract 405 from 430, 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.

Let's proceed to step 8:
If we divide 250 by 45, we get 5 and a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 16047.95
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.

Step 9:
The number 45 fits into 250 5 times, leaving a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 16047.955
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.

The final result is 16047.955 with a remainder of 0.0025.