90378 ÷ 18 
Let's see how many times 18 fits into 90378.

On to step 1:
18 goes into 9 0 times with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 18

On to step 2:
18 goes into 90 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
The remainder is 0 after subtracting 90 from 90.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 18

Let's proceed to step 3:
When dividing 3 by 18, we get 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 50.0
If we take 0 away from 3, we end up with 3.
Append the next digit (7) from the dividend to 3 and continue with: 37 / 18

On to step 4:
If we divide 37 by 18, we get 2 and a remainder of 1.
Use 2 as the next digit of our solution. 
Result so far: 502.0
Deduct 36 from 37 and we're left with 1.
Append the next digit (8) from the dividend to 1 and continue with: 18 / 18

Going ahead to step 5:
18 divided by 18 is 1 with a remainder of 0.
The next digit of our result is 1. 
Result so far: 5021.0
If we take 18 away from 18, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 6:
0 divided by 18 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 5021.0
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 7:
0 divided by 18 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 5021.0
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

In conclusion, the division gives 5021.0 with a balance of 0.0.