64171426 ÷ 80 
We want to divide 64171426 by 80.

On to step 1:
6 divided by 80 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 80

Going ahead to step 2:
64 divided by 80 is 0 with a remainder of 64.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 64, we end up with 64.
Take the next digit (1) from the dividend and append it to 64, then repeat: 641 / 80

Let's proceed to step 3:
80 goes into 641 8 times with a remainder of 1.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we take 640 away from 641, we end up with 1.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 80

Moving on to step 4:
17 divided by 80 is 0 with a remainder of 17.
The number 0 becomes the next digit in our result. 
Result so far: 80.0
If we subtract 0 from 17, we get 17.
Take the next digit (1) from the dividend and append it to 17, then repeat: 171 / 80

Step 5:
If we divide 171 by 80, we get 2 and a remainder of 11.
Use 2 as the next digit of our solution. 
Result so far: 802.0
The remainder is 11 after subtracting 160 from 171.
Take the next digit (4) from the dividend and append it to 11, then repeat: 114 / 80

Step 6:
80 goes into 114 1 times with a remainder of 34.
Write down 1 as next digit of the result. 
Result so far: 8021.0
Subtract 80 from 114 to get 34.
Include the next digit (2) from the dividend after 34, then repeat: 342 / 80

On to step 7:
342 divided by 80 is 4 with a remainder of 22.
Put 4 as the next digit of the answer. 
Result so far: 80214.0
Subtracting 320 from 342 leaves us with 22.
Append the next digit (6) from the dividend to 22 and continue with: 226 / 80

Advancing to step 8:
80 goes into 226 2 times with a remainder of 66.
Use 2 as the next digit of our solution. 
Result so far: 802142.0
Deduct 160 from 226 and we're left with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Step 9:
80 can be fit into 660 8 times, resulting in a remainder of 20.
Record the quotient 8 as the next digit in the result. 
Result so far: 802142.8
The remainder is 20 after subtracting 640 from 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 10:
When dividing 200 by 80, we get 2 with a remainder of 40.
The number 2 becomes the next digit in our result. 
Result so far: 802142.82
If we take 160 away from 200, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 11:
When dividing 400 by 80, we get 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 802142.825
Deduct 400 from 400 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.

Advancing to step 12:
80 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 802142.825
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 13:
80 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 802142.825
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 802142.825, with a leftover of 0.0.