121297 divided by 78 
We want to figure out the number of times 121297 can be divided by 78.

Advancing to step 1:
When dividing 1 by 78, we get 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 78

Advancing to step 2:
78 goes into 12 0 times with a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 12 leaves us with 12.
Include the next digit (1) from the dividend after 12, then repeat: 121 / 78

Advancing to step 3:
121 divided by 78 is 1 with a remainder of 43.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 78 away from 121, we end up with 43.
Append the next digit (2) from the dividend to 43 and continue with: 432 / 78

Advancing to step 4:
When dividing 432 by 78, we get 5 with a remainder of 42.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
The remainder is 42 after subtracting 390 from 432.
Bring next digit (9) of the dividend behind the 42 and repeat the process: 429 / 78

Going ahead to step 5:
If we divide 429 by 78, we get 5 and a remainder of 39.
Put 5 as the next digit of the answer. 
Result so far: 155.0
If we subtract 390 from 429, we get 39.
Grab the next digit (7) from the dividend, add it to 39, then carry on: 397 / 78

Moving on to step 6:
78 can be fit into 397 5 times, resulting in a remainder of 7.
Use 5 as the next digit of our solution. 
Result so far: 1555.0
Subtracting 390 from 397 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 7:
When dividing 70 by 78, we get 0 with a remainder of 70.
Record the quotient 0 as the next digit in the result. 
Result so far: 1555.0
The remainder is 70 after subtracting 0 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 8:
78 can be fit into 700 8 times, resulting in a remainder of 76.
Write down 8 as next digit of the result. 
Result so far: 1555.08
Deduct 624 from 700 and we're left 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.

Going ahead to step 9:
760 divided by 78 is 9 with a remainder of 58.
The next digit of our result is 9. 
Result so far: 1555.089
If we subtract 702 from 760, we get 58.
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 10:
580 divided by 78 is 7 with a remainder of 34.
The number 7 becomes the next digit in our result. 
Result so far: 1555.0897
Deduct 546 from 580 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Step 11:
If we divide 340 by 78, we get 4 and a remainder of 28.
Record the quotient 4 as the next digit in the result. 
Result so far: 1555.08974
Subtract 312 from 340 to get 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 12:
The number 78 fits into 280 3 times, leaving a remainder of 46.
The number 3 becomes the next digit in our result. 
Result so far: 1555.089743
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 13:
460 divided by 78 is 5 with a remainder of 70.
Use 5 as the next digit of our solution. 
Result so far: 1555.0897435
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.

Going ahead to step 14:
If we divide 700 by 78, we get 8 and a remainder of 76.
Write down 8 as next digit of the result. 
Result so far: 1555.08974358
If we subtract 624 from 700, we get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Our division results in 1555.08974358 with a remaining 7.6e-08.