We look at the division of 378980 by 42 
We're looking to find how many times 42 goes into 378980.

Advancing to step 1:
If we divide 3 by 42, we get 0 and a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Bring next digit (7) of the dividend behind the 3 and repeat the process: 37 / 42

Step 2:
42 goes into 37 0 times with a remainder of 37.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 37, we get 37.
Take the next digit (8) from the dividend and append it to 37, then repeat: 378 / 42

Advancing to step 3:
When dividing 378 by 42, we get 9 with a remainder of 0.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Subtract 378 from 378 to get 0.
Grab the next digit (9) from the dividend, add it to 0, then carry on: 9 / 42

On to step 4:
The number 42 fits into 9 0 times, leaving a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 90.0
Subtracting 0 from 9 leaves us with 9.
Include the next digit (8) from the dividend after 9, then repeat: 98 / 42

Going ahead to step 5:
42 can be fit into 98 2 times, resulting in a remainder of 14.
Write down 2 as next digit of the result. 
Result so far: 902.0
Subtract 84 from 98 to get 14.
Bring next digit (0) of the dividend behind the 14 and repeat the process: 140 / 42

Step 6:
42 goes into 140 3 times with a remainder of 14.
Write down 3 as next digit of the result. 
Result so far: 9023.0
Subtracting 126 from 140 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 7:
140 divided by 42 is 3 with a remainder of 14.
Write down 3 as next digit of the result. 
Result so far: 9023.3
Subtract 126 from 140 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 8:
42 goes into 140 3 times with a remainder of 14.
Use 3 as the next digit of our solution. 
Result so far: 9023.33
Deduct 126 from 140 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The final outcome is 9023.33, with a leftover of 0.014.