We divide 80543259 by 421
We want to divide 80543259 by 421.

Let's proceed to step 1:
The number 421 fits into 8 0 times, leaving 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.
Fetch the next digit (0) from the dividend, attach it to 8 and continue: 80 / 421

Advancing to step 2:
If we divide 80 by 421, we get 0 and a remainder of 80.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 80 and we're left with 80.
Fetch the next digit (5) from the dividend, attach it to 80 and continue: 805 / 421

Going ahead to step 3:
805 divided by 421 is 1 with a remainder of 384.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 421 from 805 leaves us with 384.
Take the next digit (4) from the dividend and append it to 384, then repeat: 3844 / 421

On to step 4:
421 can be fit into 3844 9 times, resulting in a remainder of 55.
The next digit of our result is 9. 
Result so far: 19.0
Subtracting 3789 from 3844 leaves us with 55.
Include the next digit (3) from the dividend after 55, then repeat: 553 / 421

On to step 5:
If we divide 553 by 421, we get 1 and a remainder of 132.
Put 1 as the next digit of the answer. 
Result so far: 191.0
Subtracting 421 from 553 leaves us with 132.
Include the next digit (2) from the dividend after 132, then repeat: 1322 / 421

Going ahead to step 6:
The number 421 fits into 1322 3 times, leaving a remainder of 59.
The number 3 becomes the next digit in our result. 
Result so far: 1913.0
Deduct 1263 from 1322 and we're left with 59.
Fetch the next digit (5) from the dividend, attach it to 59 and continue: 595 / 421

Going ahead to step 7:
421 goes into 595 1 times with a remainder of 174.
Write down 1 as next digit of the result. 
Result so far: 19131.0
The remainder is 174 after subtracting 421 from 595.
Include the next digit (9) from the dividend after 174, then repeat: 1749 / 421

Advancing to step 8:
1749 divided by 421 is 4 with a remainder of 65.
The next digit of our result is 4. 
Result so far: 191314.0
Deduct 1684 from 1749 and we're left with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Let's proceed to step 9:
When dividing 650 by 421, we get 1 with a remainder of 229.
Put 1 as the next digit of the answer. 
Result so far: 191314.1
Deduct 421 from 650 and we're left with 229.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2290, and continue the process.

Going ahead to step 10:
The number 421 fits into 2290 5 times, leaving a remainder of 185.
Write down 5 as next digit of the result. 
Result so far: 191314.15
If we take 2105 away from 2290, we end up with 185.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

Step 11:
1850 divided by 421 is 4 with a remainder of 166.
The number 4 becomes the next digit in our result. 
Result so far: 191314.154
Subtracting 1684 from 1850 leaves us with 166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1660, and continue the process.

Moving on to step 12:
When dividing 1660 by 421, we get 3 with a remainder of 397.
Write down 3 as next digit of the result. 
Result so far: 191314.1543
Subtracting 1263 from 1660 leaves us with 397.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3970, and continue the process.

Step 13:
3970 divided by 421 is 9 with a remainder of 181.
The number 9 becomes the next digit in our result. 
Result so far: 191314.15439
Subtracting 3789 from 3970 leaves us with 181.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1810, and continue the process.

Advancing to step 14:
The number 421 fits into 1810 4 times, leaving a remainder of 126.
Record the quotient 4 as the next digit in the result. 
Result so far: 191314.154394
Subtract 1684 from 1810 to get 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

Going ahead to step 15:
1260 divided by 421 is 2 with a remainder of 418.
Put 2 as the next digit of the answer. 
Result so far: 191314.1543942
If we take 842 away from 1260, we end up with 418.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4180, and continue the process.

Moving on to step 16:
When dividing 4180 by 421, we get 9 with a remainder of 391.
The number 9 becomes the next digit in our result. 
Result so far: 191314.15439429
Deduct 3789 from 4180 and we're left with 391.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3910, and continue the process.

Our division results in 191314.15439429 with a remaining 3.91e-07.