42010 divided by 78 
Let's see how many times 78 fits into 42010.

Going ahead to step 1:
When dividing 4 by 78, we get 0 with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 78

On to step 2:
78 goes into 42 0 times with a remainder of 42.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 42 leaves us with 42.
Include the next digit (0) from the dividend after 42, then repeat: 420 / 78

Step 3:
When dividing 420 by 78, we get 5 with a remainder of 30.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
The remainder is 30 after subtracting 390 from 420.
Append the next digit (1) from the dividend to 30 and continue with: 301 / 78

Advancing to step 4:
The number 78 fits into 301 3 times, leaving a remainder of 67.
The next digit of our result is 3. 
Result so far: 53.0
Deduct 234 from 301 and we're left with 67.
Bring next digit (0) of the dividend behind the 67 and repeat the process: 670 / 78

On to step 5:
The number 78 fits into 670 8 times, leaving a remainder of 46.
Use 8 as the next digit of our solution. 
Result so far: 538.0
Subtracting 624 from 670 leaves us with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Advancing to step 6:
460 divided by 78 is 5 with a remainder of 70.
Put 5 as the next digit of the answer. 
Result so far: 538.5
The remainder is 70 after subtracting 390 from 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Let's proceed to step 7:
The number 78 fits into 700 8 times, leaving a remainder of 76.
Put 8 as the next digit of the answer. 
Result so far: 538.58
The remainder is 76 after subtracting 624 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Let's proceed to step 8:
When dividing 760 by 78, we get 9 with a remainder of 58.
Write down 9 as next digit of the result. 
Result so far: 538.589
The remainder is 58 after subtracting 702 from 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Let's proceed to step 9:
When dividing 580 by 78, we get 7 with a remainder of 34.
Put 7 as the next digit of the answer. 
Result so far: 538.5897
The remainder is 34 after subtracting 546 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 10:
78 can be fit into 340 4 times, resulting in a remainder of 28.
The number 4 becomes the next digit in our result. 
Result so far: 538.58974
If we take 312 away from 340, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 11:
78 can be fit into 280 3 times, resulting in a remainder of 46.
Write down 3 as next digit of the result. 
Result so far: 538.589743
If we subtract 234 from 280, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Advancing to step 12:
460 divided by 78 is 5 with a remainder of 70.
Record the quotient 5 as the next digit in the result. 
Result so far: 538.5897435
Deduct 390 from 460 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 13:
The number 78 fits into 700 8 times, leaving a remainder of 76.
The next digit of our result is 8. 
Result so far: 538.58974358
Subtracting 624 from 700 leaves us with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

The final outcome is 538.58974358, with a leftover of 7.6e-08.