64401727 divided by 780 
Our goal is to divide 64401727 by 780.

Advancing to step 1:
6 divided by 780 is 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 780

Let's proceed to step 2:
780 can be fit into 64 0 times, resulting in a remainder of 64.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 64, we end up with 64.
Fetch the next digit (4) from the dividend, attach it to 64 and continue: 644 / 780

Let's proceed to step 3:
If we divide 644 by 780, we get 0 and a remainder of 644.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 644, we get 644.
Fetch the next digit (0) from the dividend, attach it to 644 and continue: 6440 / 780

Going ahead to step 4:
6440 divided by 780 is 8 with a remainder of 200.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
If we subtract 6240 from 6440, we get 200.
Include the next digit (1) from the dividend after 200, then repeat: 2001 / 780

Step 5:
The number 780 fits into 2001 2 times, leaving a remainder of 441.
Record the quotient 2 as the next digit in the result. 
Result so far: 82.0
If we subtract 1560 from 2001, we get 441.
Append the next digit (7) from the dividend to 441 and continue with: 4417 / 780

Let's proceed to step 6:
4417 divided by 780 is 5 with a remainder of 517.
Write down 5 as next digit of the result. 
Result so far: 825.0
Deduct 3900 from 4417 and we're left with 517.
Grab the next digit (2) from the dividend, add it to 517, then carry on: 5172 / 780

Moving on to step 7:
780 can be fit into 5172 6 times, resulting in a remainder of 492.
The number 6 becomes the next digit in our result. 
Result so far: 8256.0
The remainder is 492 after subtracting 4680 from 5172.
Grab the next digit (7) from the dividend, add it to 492, then carry on: 4927 / 780

Advancing to step 8:
780 goes into 4927 6 times with a remainder of 247.
Put 6 as the next digit of the answer. 
Result so far: 82566.0
Deduct 4680 from 4927 and we're left with 247.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2470, and continue the process.

Moving on to step 9:
If we divide 2470 by 780, we get 3 and a remainder of 130.
The next digit of our result is 3. 
Result so far: 82566.3
Subtracting 2340 from 2470 leaves us with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Let's proceed to step 10:
If we divide 1300 by 780, we get 1 and a remainder of 520.
The next digit of our result is 1. 
Result so far: 82566.31
Subtracting 780 from 1300 leaves us with 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

On to step 11:
780 goes into 5200 6 times with a remainder of 520.
Put 6 as the next digit of the answer. 
Result so far: 82566.316
Subtract 4680 from 5200 to get 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Let's proceed to step 12:
The number 780 fits into 5200 6 times, leaving a remainder of 520.
Record the quotient 6 as the next digit in the result. 
Result so far: 82566.3166
Subtract 4680 from 5200 to get 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

The final outcome is 82566.3166, with a leftover of 0.0052.