78112 ÷ 18 
We want to figure out the number of times 78112 can be divided by 18.

Going ahead to step 1:
If we divide 7 by 18, we get 0 and a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 18

Step 2:
If we divide 78 by 18, we get 4 and a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtract 72 from 78 to get 6.
Fetch the next digit (1) from the dividend, attach it to 6 and continue: 61 / 18

Going ahead to step 3:
18 can be fit into 61 3 times, resulting in a remainder of 7.
Write down 3 as next digit of the result. 
Result so far: 43.0
If we subtract 54 from 61, we get 7.
Take the next digit (1) from the dividend and append it to 7, then repeat: 71 / 18

Going ahead to step 4:
18 can be fit into 71 3 times, resulting in a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 433.0
Deduct 54 from 71 and we're left with 17.
Bring next digit (2) of the dividend behind the 17 and repeat the process: 172 / 18

Moving on to step 5:
When dividing 172 by 18, we get 9 with a remainder of 10.
Use 9 as the next digit of our solution. 
Result so far: 4339.0
If we subtract 162 from 172, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 6:
When dividing 100 by 18, we get 5 with a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 4339.5
Subtract 90 from 100 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 7:
The number 18 fits into 100 5 times, leaving a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 4339.55
If we take 90 away from 100, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final result is 4339.55 with a remainder of 0.01.