We look at the division of 251217 by 78 
We want to figure out the number of times 251217 can be divided by 78.

Going ahead to step 1:
The number 78 fits into 2 0 times, leaving a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Include the next digit (5) from the dividend after 2, then repeat: 25 / 78

Going ahead to step 2:
25 divided by 78 is 0 with a remainder of 25.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 25 leaves us with 25.
Append the next digit (1) from the dividend to 25 and continue with: 251 / 78

Going ahead to step 3:
When dividing 251 by 78, we get 3 with a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtracting 234 from 251 leaves us with 17.
Grab the next digit (2) from the dividend, add it to 17, then carry on: 172 / 78

Going ahead to step 4:
When dividing 172 by 78, we get 2 with a remainder of 16.
The next digit of our result is 2. 
Result so far: 32.0
Deduct 156 from 172 and we're left with 16.
Take the next digit (1) from the dividend and append it to 16, then repeat: 161 / 78

Going ahead to step 5:
161 divided by 78 is 2 with a remainder of 5.
The next digit of our result is 2. 
Result so far: 322.0
Subtracting 156 from 161 leaves us with 5.
Append the next digit (7) from the dividend to 5 and continue with: 57 / 78

Moving on to step 6:
78 can be fit into 57 0 times, resulting in a remainder of 57.
Use 0 as the next digit of our solution. 
Result so far: 3220.0
Subtracting 0 from 57 leaves us with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

On to step 7:
The number 78 fits into 570 7 times, leaving a remainder of 24.
The number 7 becomes the next digit in our result. 
Result so far: 3220.7
If we subtract 546 from 570, we get 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 8:
If we divide 240 by 78, we get 3 and a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 3220.73
Deduct 234 from 240 and we're left 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.

On to step 9:
When dividing 60 by 78, we get 0 with a remainder of 60.
Record the quotient 0 as the next digit in the result. 
Result so far: 3220.73
Subtracting 0 from 60 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 10:
78 can be fit into 600 7 times, resulting in a remainder of 54.
The number 7 becomes the next digit in our result. 
Result so far: 3220.7307
If we subtract 546 from 600, we get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Step 11:
The number 78 fits into 540 6 times, leaving a remainder of 72.
The number 6 becomes the next digit in our result. 
Result so far: 3220.73076
If we subtract 468 from 540, we get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

On to step 12:
The number 78 fits into 720 9 times, leaving a remainder of 18.
The next digit of our result is 9. 
Result so far: 3220.730769
Subtracting 702 from 720 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.

Going ahead to step 13:
180 divided by 78 is 2 with a remainder of 24.
Put 2 as the next digit of the answer. 
Result so far: 3220.7307692
The remainder is 24 after subtracting 156 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 14:
78 goes into 240 3 times with a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 3220.73076923
Subtracting 234 from 240 leaves us 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.

The final result is 3220.73076923 with a remainder of 6e-09.