We look at the division of 198172 by 78 
We want to divide 198172 by 78.

Step 1:
When dividing 1 by 78, we get 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Include the next digit (9) from the dividend after 1, then repeat: 19 / 78

Moving on to step 2:
The number 78 fits into 19 0 times, leaving a remainder of 19.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 19 to get 19.
Fetch the next digit (8) from the dividend, attach it to 19 and continue: 198 / 78

Advancing to step 3:
If we divide 198 by 78, we get 2 and a remainder of 42.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Deduct 156 from 198 and we're left with 42.
Grab the next digit (1) from the dividend, add it to 42, then carry on: 421 / 78

Advancing to step 4:
The number 78 fits into 421 5 times, leaving a remainder of 31.
The number 5 becomes the next digit in our result. 
Result so far: 25.0
If we take 390 away from 421, we end up with 31.
Fetch the next digit (7) from the dividend, attach it to 31 and continue: 317 / 78

Let's proceed to step 5:
The number 78 fits into 317 4 times, leaving a remainder of 5.
The number 4 becomes the next digit in our result. 
Result so far: 254.0
The remainder is 5 after subtracting 312 from 317.
Include the next digit (2) from the dividend after 5, then repeat: 52 / 78

Going ahead to step 6:
The number 78 fits into 52 0 times, leaving a remainder of 52.
The next digit of our result is 0. 
Result so far: 2540.0
The remainder is 52 after subtracting 0 from 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Advancing to step 7:
78 can be fit into 520 6 times, resulting in a remainder of 52.
Write down 6 as next digit of the result. 
Result so far: 2540.6
The remainder is 52 after subtracting 468 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Moving on to step 8:
78 can be fit into 520 6 times, resulting in a remainder of 52.
The next digit of our result is 6. 
Result so far: 2540.66
Subtracting 468 from 520 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

In conclusion, the division gives 2540.66 with a balance of 0.052.