78966 ÷ 42 
Our goal is to divide 78966 by 42.

Step 1:
7 divided by 42 is 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Fetch the next digit (8) from the dividend, attach it to 7 and continue: 78 / 42

Moving on to step 2:
42 can be fit into 78 1 times, resulting in a remainder of 36.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 42 from 78 and we're left with 36.
Bring next digit (9) of the dividend behind the 36 and repeat the process: 369 / 42

On to step 3:
If we divide 369 by 42, we get 8 and a remainder of 33.
Use 8 as the next digit of our solution. 
Result so far: 18.0
If we take 336 away from 369, we end up with 33.
Fetch the next digit (6) from the dividend, attach it to 33 and continue: 336 / 42

Going ahead to step 4:
When dividing 336 by 42, we get 8 with a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 188.0
If we subtract 336 from 336, we get 0.
Append the next digit (6) from the dividend to 0 and continue with: 6 / 42

Let's proceed to step 5:
The number 42 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 1880.0
The remainder is 6 after subtracting 0 from 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 6:
If we divide 60 by 42, we get 1 and a remainder of 18.
The number 1 becomes the next digit in our result. 
Result so far: 1880.1
Subtracting 42 from 60 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 7:
When dividing 180 by 42, we get 4 with a remainder of 12.
Use 4 as the next digit of our solution. 
Result so far: 1880.14
Subtract 168 from 180 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 8:
The number 42 fits into 120 2 times, leaving a remainder of 36.
Use 2 as the next digit of our solution. 
Result so far: 1880.142
If we take 84 away from 120, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 9:
42 goes into 360 8 times with a remainder of 24.
Write down 8 as next digit of the result. 
Result so far: 1880.1428
Subtracting 336 from 360 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 10:
42 goes into 240 5 times with a remainder of 30.
Use 5 as the next digit of our solution. 
Result so far: 1880.14285
Deduct 210 from 240 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 11:
300 divided by 42 is 7 with a remainder of 6.
Put 7 as the next digit of the answer. 
Result so far: 1880.142857
If we take 294 away from 300, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 12:
42 can be fit into 60 1 times, resulting in a remainder of 18.
The number 1 becomes the next digit in our result. 
Result so far: 1880.1428571
Subtracting 42 from 60 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 13:
The number 42 fits into 180 4 times, leaving a remainder of 12.
Use 4 as the next digit of our solution. 
Result so far: 1880.14285714
Subtract 168 from 180 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The quotient of the division is 1880.14285714, and the remainder is 1.2e-08.