We divide 78416477 by 129
Our goal is to divide 78416477 by 129.

Advancing to step 1:
The number 129 fits into 7 0 times, leaving a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 129

Moving on to step 2:
78 divided by 129 is 0 with a remainder of 78.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 78 to get 78.
Grab the next digit (4) from the dividend, add it to 78, then carry on: 784 / 129

Step 3:
The number 129 fits into 784 6 times, leaving a remainder of 10.
Write down 6 as next digit of the result. 
Result so far: 6.0
If we subtract 774 from 784, we get 10.
Grab the next digit (1) from the dividend, add it to 10, then carry on: 101 / 129

Moving on to step 4:
If we divide 101 by 129, we get 0 and a remainder of 101.
The next digit of our result is 0. 
Result so far: 60.0
If we take 0 away from 101, we end up with 101.
Include the next digit (6) from the dividend after 101, then repeat: 1016 / 129

Going ahead to step 5:
129 goes into 1016 7 times with a remainder of 113.
Write down 7 as next digit of the result. 
Result so far: 607.0
Subtract 903 from 1016 to get 113.
Bring next digit (4) of the dividend behind the 113 and repeat the process: 1134 / 129

Moving on to step 6:
129 can be fit into 1134 8 times, resulting in a remainder of 102.
Put 8 as the next digit of the answer. 
Result so far: 6078.0
Subtracting 1032 from 1134 leaves us with 102.
Include the next digit (7) from the dividend after 102, then repeat: 1027 / 129

Advancing to step 7:
129 goes into 1027 7 times with a remainder of 124.
Record the quotient 7 as the next digit in the result. 
Result so far: 60787.0
Subtract 903 from 1027 to get 124.
Append the next digit (7) from the dividend to 124 and continue with: 1247 / 129

On to step 8:
When dividing 1247 by 129, we get 9 with a remainder of 86.
The number 9 becomes the next digit in our result. 
Result so far: 607879.0
Deduct 1161 from 1247 and we're left with 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Let's proceed to step 9:
129 can be fit into 860 6 times, resulting in a remainder of 86.
Put 6 as the next digit of the answer. 
Result so far: 607879.6
Deduct 774 from 860 and we're left with 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Moving on to step 10:
129 can be fit into 860 6 times, resulting in a remainder of 86.
Write down 6 as next digit of the result. 
Result so far: 607879.66
Deduct 774 from 860 and we're left with 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

The final outcome is 607879.66, with a leftover of 0.086.