We're dividing 641854 by 80 
We want to divide 641854 by 80.

Moving on to step 1:
When dividing 6 by 80, we get 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 80

On to step 2:
80 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
Deduct 0 from 64 and we're left with 64.
Take the next digit (1) from the dividend and append it to 64, then repeat: 641 / 80

On to step 3:
80 goes into 641 8 times with a remainder of 1.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Subtracting 640 from 641 leaves us with 1.
Append the next digit (8) from the dividend to 1 and continue with: 18 / 80

On to step 4:
When dividing 18 by 80, we get 0 with a remainder of 18.
The number 0 becomes the next digit in our result. 
Result so far: 80.0
If we subtract 0 from 18, we get 18.
Take the next digit (5) from the dividend and append it to 18, then repeat: 185 / 80

Advancing to step 5:
The number 80 fits into 185 2 times, leaving a remainder of 25.
Put 2 as the next digit of the answer. 
Result so far: 802.0
Subtracting 160 from 185 leaves us with 25.
Include the next digit (4) from the dividend after 25, then repeat: 254 / 80

Going ahead to step 6:
254 divided by 80 is 3 with a remainder of 14.
Write down 3 as next digit of the result. 
Result so far: 8023.0
Subtract 240 from 254 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 7:
140 divided by 80 is 1 with a remainder of 60.
The number 1 becomes the next digit in our result. 
Result so far: 8023.1
Deduct 80 from 140 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 8:
80 can be fit into 600 7 times, resulting in a remainder of 40.
The next digit of our result is 7. 
Result so far: 8023.17
Subtract 560 from 600 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 9:
80 can be fit into 400 5 times, resulting in a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 8023.175
Subtracting 400 from 400 leaves us 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.

Going ahead to step 10:
80 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 8023.175
If we subtract 0 from 0, we 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.

Moving on to step 11:
The number 80 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 8023.175
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.

After the division, we end up with 8023.175 and a remainder of 0.0.