We look at the division of 77278390 by 415 
Our goal is to divide 77278390 by 415.

Moving on to step 1:
When dividing 7 by 415, we get 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Take the next digit (7) from the dividend and append it to 7, then repeat: 77 / 415

Step 2:
77 divided by 415 is 0 with a remainder of 77.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 77 leaves us with 77.
Bring next digit (2) of the dividend behind the 77 and repeat the process: 772 / 415

Advancing to step 3:
415 goes into 772 1 times with a remainder of 357.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 415 away from 772, we end up with 357.
Take the next digit (7) from the dividend and append it to 357, then repeat: 3577 / 415

Let's proceed to step 4:
If we divide 3577 by 415, we get 8 and a remainder of 257.
The next digit of our result is 8. 
Result so far: 18.0
Subtract 3320 from 3577 to get 257.
Append the next digit (8) from the dividend to 257 and continue with: 2578 / 415

Going ahead to step 5:
2578 divided by 415 is 6 with a remainder of 88.
Write down 6 as next digit of the result. 
Result so far: 186.0
Subtracting 2490 from 2578 leaves us with 88.
Include the next digit (3) from the dividend after 88, then repeat: 883 / 415

Going ahead to step 6:
415 can be fit into 883 2 times, resulting in a remainder of 53.
The next digit of our result is 2. 
Result so far: 1862.0
If we subtract 830 from 883, we get 53.
Include the next digit (9) from the dividend after 53, then repeat: 539 / 415

Moving on to step 7:
The number 415 fits into 539 1 times, leaving a remainder of 124.
Write down 1 as next digit of the result. 
Result so far: 18621.0
Deduct 415 from 539 and we're left with 124.
Take the next digit (0) from the dividend and append it to 124, then repeat: 1240 / 415

On to step 8:
1240 divided by 415 is 2 with a remainder of 410.
The next digit of our result is 2. 
Result so far: 186212.0
Deduct 830 from 1240 and we're left with 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4100, and continue the process.

Let's proceed to step 9:
415 can be fit into 4100 9 times, resulting in a remainder of 365.
The number 9 becomes the next digit in our result. 
Result so far: 186212.9
If we subtract 3735 from 4100, we get 365.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3650, and continue the process.

Advancing to step 10:
415 can be fit into 3650 8 times, resulting in a remainder of 330.
Write down 8 as next digit of the result. 
Result so far: 186212.98
If we subtract 3320 from 3650, we get 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

Step 11:
415 goes into 3300 7 times with a remainder of 395.
Write down 7 as next digit of the result. 
Result so far: 186212.987
If we subtract 2905 from 3300, we get 395.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3950, and continue the process.

Advancing to step 12:
When dividing 3950 by 415, we get 9 with a remainder of 215.
Put 9 as the next digit of the answer. 
Result so far: 186212.9879
Subtract 3735 from 3950 to get 215.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

Advancing to step 13:
415 can be fit into 2150 5 times, resulting in a remainder of 75.
The next digit of our result is 5. 
Result so far: 186212.98795
Deduct 2075 from 2150 and we're left with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Let's proceed to step 14:
415 goes into 750 1 times with a remainder of 335.
The number 1 becomes the next digit in our result. 
Result so far: 186212.987951
Subtracting 415 from 750 leaves us with 335.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3350, and continue the process.

Advancing to step 15:
When dividing 3350 by 415, we get 8 with a remainder of 30.
Write down 8 as next digit of the result. 
Result so far: 186212.9879518
The remainder is 30 after subtracting 3320 from 3350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 16:
415 goes into 300 0 times with a remainder of 300.
Record the quotient 0 as the next digit in the result. 
Result so far: 186212.9879518
If we subtract 0 from 300, we get 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

The final outcome is 186212.9879518, with a leftover of 3e-07.