We look at the division of 215970 by 45 
We're looking to find how many times 45 goes into 215970.

Moving on to step 1:
45 can be fit into 2 0 times, resulting in a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 45

Moving on to step 2:
45 can be fit into 21 0 times, resulting in a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Bring next digit (5) of the dividend behind the 21 and repeat the process: 215 / 45

Step 3:
215 divided by 45 is 4 with a remainder of 35.
Write down 4 as next digit of the result. 
Result so far: 4.0
If we take 180 away from 215, we end up with 35.
Include the next digit (9) from the dividend after 35, then repeat: 359 / 45

On to step 4:
359 divided by 45 is 7 with a remainder of 44.
Write down 7 as next digit of the result. 
Result so far: 47.0
Subtracting 315 from 359 leaves us with 44.
Grab the next digit (7) from the dividend, add it to 44, then carry on: 447 / 45

Going ahead to step 5:
When dividing 447 by 45, we get 9 with a remainder of 42.
Use 9 as the next digit of our solution. 
Result so far: 479.0
Deduct 405 from 447 and we're left with 42.
Grab the next digit (0) from the dividend, add it to 42, then carry on: 420 / 45

Going ahead to step 6:
If we divide 420 by 45, we get 9 and a remainder of 15.
The next digit of our result is 9. 
Result so far: 4799.0
The remainder is 15 after subtracting 405 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 7:
When dividing 150 by 45, we get 3 with a remainder of 15.
The number 3 becomes the next digit in our result. 
Result so far: 4799.3
The remainder is 15 after subtracting 135 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 8:
When dividing 150 by 45, we get 3 with a remainder of 15.
The next digit of our result is 3. 
Result so far: 4799.33
Subtract 135 from 150 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Our division results in 4799.33 with a remaining 0.015.