We're dividing 78420 by 50 
We want to divide 78420 by 50.

Advancing to step 1:
If we divide 7 by 50, we get 0 and a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 50

Moving on to step 2:
The number 50 fits into 78 1 times, leaving a remainder of 28.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 50 from 78 and we're left with 28.
Fetch the next digit (4) from the dividend, attach it to 28 and continue: 284 / 50

Moving on to step 3:
If we divide 284 by 50, we get 5 and a remainder of 34.
Use 5 as the next digit of our solution. 
Result so far: 15.0
If we subtract 250 from 284, we get 34.
Bring next digit (2) of the dividend behind the 34 and repeat the process: 342 / 50

Advancing to step 4:
342 divided by 50 is 6 with a remainder of 42.
The number 6 becomes the next digit in our result. 
Result so far: 156.0
The remainder is 42 after subtracting 300 from 342.
Append the next digit (0) from the dividend to 42 and continue with: 420 / 50

Step 5:
420 divided by 50 is 8 with a remainder of 20.
The next digit of our result is 8. 
Result so far: 1568.0
Subtracting 400 from 420 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 6:
When dividing 200 by 50, we get 4 with a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 1568.4
If we subtract 200 from 200, 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.

Moving on to step 7:
50 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 1568.4
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.

Let's proceed to step 8:
50 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 1568.4
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.

Our division results in 1568.4 with a remaining 0.0.