78666853 divided by 64 
Our goal is to divide 78666853 by 64.

On to step 1:
64 can be fit into 7 0 times, resulting in a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Fetch the next digit (8) from the dividend, attach it to 7 and continue: 78 / 64

Let's proceed to step 2:
64 goes into 78 1 times with a remainder of 14.
The next digit of our result is 1. 
Result so far: 1.0
If we take 64 away from 78, we end up with 14.
Take the next digit (6) from the dividend and append it to 14, then repeat: 146 / 64

Advancing to step 3:
If we divide 146 by 64, we get 2 and a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 12.0
Subtracting 128 from 146 leaves us with 18.
Bring next digit (6) of the dividend behind the 18 and repeat the process: 186 / 64

Moving on to step 4:
64 can be fit into 186 2 times, resulting in a remainder of 58.
The next digit of our result is 2. 
Result so far: 122.0
Subtracting 128 from 186 leaves us with 58.
Take the next digit (6) from the dividend and append it to 58, then repeat: 586 / 64

Advancing to step 5:
If we divide 586 by 64, we get 9 and a remainder of 10.
Record the quotient 9 as the next digit in the result. 
Result so far: 1229.0
Deduct 576 from 586 and we're left with 10.
Include the next digit (8) from the dividend after 10, then repeat: 108 / 64

Advancing to step 6:
If we divide 108 by 64, we get 1 and a remainder of 44.
Write down 1 as next digit of the result. 
Result so far: 12291.0
The remainder is 44 after subtracting 64 from 108.
Append the next digit (5) from the dividend to 44 and continue with: 445 / 64

Let's proceed to step 7:
If we divide 445 by 64, we get 6 and a remainder of 61.
Use 6 as the next digit of our solution. 
Result so far: 122916.0
If we take 384 away from 445, we end up with 61.
Include the next digit (3) from the dividend after 61, then repeat: 613 / 64

Step 8:
The number 64 fits into 613 9 times, leaving a remainder of 37.
The next digit of our result is 9. 
Result so far: 1229169.0
The remainder is 37 after subtracting 576 from 613.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Let's proceed to step 9:
64 can be fit into 370 5 times, resulting in a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 1229169.5
If we subtract 320 from 370, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 10:
64 goes into 500 7 times with a remainder of 52.
The number 7 becomes the next digit in our result. 
Result so far: 1229169.57
The remainder is 52 after subtracting 448 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 11:
520 divided by 64 is 8 with a remainder of 8.
Write down 8 as next digit of the result. 
Result so far: 1229169.578
Deduct 512 from 520 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 12:
The number 64 fits into 80 1 times, leaving a remainder of 16.
The number 1 becomes the next digit in our result. 
Result so far: 1229169.5781
Subtract 64 from 80 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 13:
64 can be fit into 160 2 times, resulting in a remainder of 32.
The next digit of our result is 2. 
Result so far: 1229169.57812
If we subtract 128 from 160, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 14:
64 can be fit into 320 5 times, resulting in a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 1229169.578125
Deduct 320 from 320 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 15:
64 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 1229169.578125
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 16:
If we divide 0 by 64, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 1229169.578125
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 1229169.578125 and a remainder of 0.0.