80421371 divided by 71 
Let's see how many times 71 fits into 80421371.

Step 1:
71 goes into 8 0 times with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 71

Moving on to step 2:
71 goes into 80 1 times with a remainder of 9.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 71 from 80 and we're left with 9.
Bring next digit (4) of the dividend behind the 9 and repeat the process: 94 / 71

Going ahead to step 3:
If we divide 94 by 71, we get 1 and a remainder of 23.
Write down 1 as next digit of the result. 
Result so far: 11.0
If we subtract 71 from 94, we get 23.
Append the next digit (2) from the dividend to 23 and continue with: 232 / 71

Going ahead to step 4:
If we divide 232 by 71, we get 3 and a remainder of 19.
Put 3 as the next digit of the answer. 
Result so far: 113.0
If we subtract 213 from 232, we get 19.
Take the next digit (1) from the dividend and append it to 19, then repeat: 191 / 71

Step 5:
71 goes into 191 2 times with a remainder of 49.
Write down 2 as next digit of the result. 
Result so far: 1132.0
Subtracting 142 from 191 leaves us with 49.
Bring next digit (3) of the dividend behind the 49 and repeat the process: 493 / 71

Going ahead to step 6:
The number 71 fits into 493 6 times, leaving a remainder of 67.
Use 6 as the next digit of our solution. 
Result so far: 11326.0
Subtract 426 from 493 to get 67.
Append the next digit (7) from the dividend to 67 and continue with: 677 / 71

Advancing to step 7:
71 goes into 677 9 times with a remainder of 38.
The next digit of our result is 9. 
Result so far: 113269.0
Subtracting 639 from 677 leaves us with 38.
Fetch the next digit (1) from the dividend, attach it to 38 and continue: 381 / 71

On to step 8:
71 can be fit into 381 5 times, resulting in a remainder of 26.
Put 5 as the next digit of the answer. 
Result so far: 1132695.0
If we subtract 355 from 381, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Step 9:
When dividing 260 by 71, we get 3 with a remainder of 47.
Record the quotient 3 as the next digit in the result. 
Result so far: 1132695.3
If we subtract 213 from 260, we get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Going ahead to step 10:
71 can be fit into 470 6 times, resulting in a remainder of 44.
Write down 6 as next digit of the result. 
Result so far: 1132695.36
Deduct 426 from 470 and we're left with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Step 11:
If we divide 440 by 71, we get 6 and a remainder of 14.
Use 6 as the next digit of our solution. 
Result so far: 1132695.366
Deduct 426 from 440 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

After the division, we end up with 1132695.366 and a remainder of 0.0014.