80910217 ÷ 343 
We want to figure out the number of times 80910217 can be divided by 343.

On to step 1:
343 can be fit into 8 0 times, resulting in a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Append the next digit (0) from the dividend to 8 and continue with: 80 / 343

Advancing to step 2:
343 can be fit into 80 0 times, resulting in a remainder of 80.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 80 leaves us with 80.
Take the next digit (9) from the dividend and append it to 80, then repeat: 809 / 343

Moving on to step 3:
809 divided by 343 is 2 with a remainder of 123.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Deduct 686 from 809 and we're left with 123.
Take the next digit (1) from the dividend and append it to 123, then repeat: 1231 / 343

Advancing to step 4:
343 goes into 1231 3 times with a remainder of 202.
The next digit of our result is 3. 
Result so far: 23.0
Deduct 1029 from 1231 and we're left with 202.
Take the next digit (0) from the dividend and append it to 202, then repeat: 2020 / 343

Going ahead to step 5:
343 goes into 2020 5 times with a remainder of 305.
Use 5 as the next digit of our solution. 
Result so far: 235.0
Subtracting 1715 from 2020 leaves us with 305.
Include the next digit (2) from the dividend after 305, then repeat: 3052 / 343

Step 6:
The number 343 fits into 3052 8 times, leaving a remainder of 308.
The next digit of our result is 8. 
Result so far: 2358.0
The remainder is 308 after subtracting 2744 from 3052.
Bring next digit (1) of the dividend behind the 308 and repeat the process: 3081 / 343

Let's proceed to step 7:
The number 343 fits into 3081 8 times, leaving a remainder of 337.
Write down 8 as next digit of the result. 
Result so far: 23588.0
If we take 2744 away from 3081, we end up with 337.
Include the next digit (7) from the dividend after 337, then repeat: 3377 / 343

Advancing to step 8:
343 can be fit into 3377 9 times, resulting in a remainder of 290.
The number 9 becomes the next digit in our result. 
Result so far: 235889.0
If we subtract 3087 from 3377, we get 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Let's proceed to step 9:
343 can be fit into 2900 8 times, resulting in a remainder of 156.
The next digit of our result is 8. 
Result so far: 235889.8
The remainder is 156 after subtracting 2744 from 2900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Step 10:
343 can be fit into 1560 4 times, resulting in a remainder of 188.
The next digit of our result is 4. 
Result so far: 235889.84
The remainder is 188 after subtracting 1372 from 1560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

Advancing to step 11:
1880 divided by 343 is 5 with a remainder of 165.
Use 5 as the next digit of our solution. 
Result so far: 235889.845
If we subtract 1715 from 1880, we get 165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

On to step 12:
When dividing 1650 by 343, we get 4 with a remainder of 278.
Record the quotient 4 as the next digit in the result. 
Result so far: 235889.8454
The remainder is 278 after subtracting 1372 from 1650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2780, and continue the process.

Moving on to step 13:
When dividing 2780 by 343, we get 8 with a remainder of 36.
Put 8 as the next digit of the answer. 
Result so far: 235889.84548
Subtract 2744 from 2780 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 14:
If we divide 360 by 343, we get 1 and a remainder of 17.
The next digit of our result is 1. 
Result so far: 235889.845481
Deduct 343 from 360 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 15:
343 can be fit into 170 0 times, resulting in a remainder of 170.
The next digit of our result is 0. 
Result so far: 235889.845481
Subtracting 0 from 170 leaves us with 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

On to step 16:
343 goes into 1700 4 times with a remainder of 328.
The number 4 becomes the next digit in our result. 
Result so far: 235889.84548104
If we subtract 1372 from 1700, we get 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

After the division, we end up with 235889.84548104 and a remainder of 3.28e-07.