78507994 ÷ 121 
We want to divide 78507994 by 121.

Going ahead to step 1:
121 goes into 7 0 times with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 121

Let's proceed to step 2:
When dividing 78 by 121, we get 0 with a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 78 and we're left with 78.
Fetch the next digit (5) from the dividend, attach it to 78 and continue: 785 / 121

Let's proceed to step 3:
If we divide 785 by 121, we get 6 and a remainder of 59.
Use 6 as the next digit of our solution. 
Result so far: 6.0
If we take 726 away from 785, we end up with 59.
Append the next digit (0) from the dividend to 59 and continue with: 590 / 121

Let's proceed to step 4:
If we divide 590 by 121, we get 4 and a remainder of 106.
Use 4 as the next digit of our solution. 
Result so far: 64.0
If we subtract 484 from 590, we get 106.
Append the next digit (7) from the dividend to 106 and continue with: 1067 / 121

Going ahead to step 5:
121 can be fit into 1067 8 times, resulting in a remainder of 99.
The next digit of our result is 8. 
Result so far: 648.0
If we take 968 away from 1067, we end up with 99.
Grab the next digit (9) from the dividend, add it to 99, then carry on: 999 / 121

Moving on to step 6:
121 goes into 999 8 times with a remainder of 31.
The next digit of our result is 8. 
Result so far: 6488.0
The remainder is 31 after subtracting 968 from 999.
Include the next digit (9) from the dividend after 31, then repeat: 319 / 121

Let's proceed to step 7:
121 can be fit into 319 2 times, resulting in a remainder of 77.
Use 2 as the next digit of our solution. 
Result so far: 64882.0
Subtract 242 from 319 to get 77.
Append the next digit (4) from the dividend to 77 and continue with: 774 / 121

Step 8:
774 divided by 121 is 6 with a remainder of 48.
The next digit of our result is 6. 
Result so far: 648826.0
Subtract 726 from 774 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Let's proceed to step 9:
121 goes into 480 3 times with a remainder of 117.
Write down 3 as next digit of the result. 
Result so far: 648826.3
Subtract 363 from 480 to get 117.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1170, and continue the process.

Let's proceed to step 10:
When dividing 1170 by 121, we get 9 with a remainder of 81.
The next digit of our result is 9. 
Result so far: 648826.39
Subtracting 1089 from 1170 leaves us with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Advancing to step 11:
121 goes into 810 6 times with a remainder of 84.
Put 6 as the next digit of the answer. 
Result so far: 648826.396
If we take 726 away from 810, we end up with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Going ahead to step 12:
When dividing 840 by 121, we get 6 with a remainder of 114.
Write down 6 as next digit of the result. 
Result so far: 648826.3966
Subtract 726 from 840 to get 114.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1140, and continue the process.

In conclusion, the division gives 648826.3966 with a balance of 0.00114.