Let's divide 21371 by 78
Our goal is to divide 21371 by 78.

Moving on to step 1:
When dividing 2 by 78, we get 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 78

Moving on to step 2:
The number 78 fits into 21 0 times, leaving a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 21, we end up with 21.
Bring next digit (3) of the dividend behind the 21 and repeat the process: 213 / 78

Going ahead to step 3:
78 can be fit into 213 2 times, resulting in a remainder of 57.
The next digit of our result is 2. 
Result so far: 2.0
Subtract 156 from 213 to get 57.
Include the next digit (7) from the dividend after 57, then repeat: 577 / 78

On to step 4:
78 goes into 577 7 times with a remainder of 31.
Write down 7 as next digit of the result. 
Result so far: 27.0
The remainder is 31 after subtracting 546 from 577.
Append the next digit (1) from the dividend to 31 and continue with: 311 / 78

Advancing to step 5:
The number 78 fits into 311 3 times, leaving a remainder of 77.
Use 3 as the next digit of our solution. 
Result so far: 273.0
Subtract 234 from 311 to get 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

On to step 6:
If we divide 770 by 78, we get 9 and a remainder of 68.
Record the quotient 9 as the next digit in the result. 
Result so far: 273.9
Deduct 702 from 770 and we're left with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Step 7:
78 can be fit into 680 8 times, resulting in a remainder of 56.
Record the quotient 8 as the next digit in the result. 
Result so far: 273.98
The remainder is 56 after subtracting 624 from 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Going ahead to step 8:
If we divide 560 by 78, we get 7 and a remainder of 14.
The number 7 becomes the next digit in our result. 
Result so far: 273.987
If we subtract 546 from 560, we 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 9:
The number 78 fits into 140 1 times, leaving a remainder of 62.
Put 1 as the next digit of the answer. 
Result so far: 273.9871
If we subtract 78 from 140, we get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Moving on to step 10:
The number 78 fits into 620 7 times, leaving a remainder of 74.
The number 7 becomes the next digit in our result. 
Result so far: 273.98717
Subtract 546 from 620 to get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Let's proceed to step 11:
The number 78 fits into 740 9 times, leaving a remainder of 38.
The number 9 becomes the next digit in our result. 
Result so far: 273.987179
The remainder is 38 after subtracting 702 from 740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 12:
78 goes into 380 4 times with a remainder of 68.
The next digit of our result is 4. 
Result so far: 273.9871794
The remainder is 68 after subtracting 312 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Moving on to step 13:
The number 78 fits into 680 8 times, leaving a remainder of 56.
Use 8 as the next digit of our solution. 
Result so far: 273.98717948
Subtracting 624 from 680 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

The final outcome is 273.98717948, with a leftover of 5.6e-08.