We divide 90151719 by 321
We want to divide 90151719 by 321.

Let's proceed to step 1:
321 can be fit into 9 0 times, resulting in a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 321

On to step 2:
321 goes into 90 0 times with a remainder of 90.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 90 and we're left with 90.
Take the next digit (1) from the dividend and append it to 90, then repeat: 901 / 321

On to step 3:
901 divided by 321 is 2 with a remainder of 259.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtract 642 from 901 to get 259.
Include the next digit (5) from the dividend after 259, then repeat: 2595 / 321

Advancing to step 4:
2595 divided by 321 is 8 with a remainder of 27.
The next digit of our result is 8. 
Result so far: 28.0
If we subtract 2568 from 2595, we get 27.
Take the next digit (1) from the dividend and append it to 27, then repeat: 271 / 321

Going ahead to step 5:
271 divided by 321 is 0 with a remainder of 271.
Write down 0 as next digit of the result. 
Result so far: 280.0
The remainder is 271 after subtracting 0 from 271.
Fetch the next digit (7) from the dividend, attach it to 271 and continue: 2717 / 321

Moving on to step 6:
321 goes into 2717 8 times with a remainder of 149.
Put 8 as the next digit of the answer. 
Result so far: 2808.0
Deduct 2568 from 2717 and we're left with 149.
Fetch the next digit (1) from the dividend, attach it to 149 and continue: 1491 / 321

Step 7:
1491 divided by 321 is 4 with a remainder of 207.
The number 4 becomes the next digit in our result. 
Result so far: 28084.0
Subtracting 1284 from 1491 leaves us with 207.
Fetch the next digit (9) from the dividend, attach it to 207 and continue: 2079 / 321

Step 8:
If we divide 2079 by 321, we get 6 and a remainder of 153.
The number 6 becomes the next digit in our result. 
Result so far: 280846.0
Deduct 1926 from 2079 and we're left with 153.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1530, and continue the process.

Step 9:
When dividing 1530 by 321, we get 4 with a remainder of 246.
The next digit of our result is 4. 
Result so far: 280846.4
Deduct 1284 from 1530 and we're left with 246.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2460, and continue the process.

Let's proceed to step 10:
321 can be fit into 2460 7 times, resulting in a remainder of 213.
The next digit of our result is 7. 
Result so far: 280846.47
If we take 2247 away from 2460, we end up with 213.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2130, and continue the process.

Advancing to step 11:
When dividing 2130 by 321, we get 6 with a remainder of 204.
Put 6 as the next digit of the answer. 
Result so far: 280846.476
The remainder is 204 after subtracting 1926 from 2130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2040, and continue the process.

Let's proceed to step 12:
If we divide 2040 by 321, we get 6 and a remainder of 114.
Record the quotient 6 as the next digit in the result. 
Result so far: 280846.4766
If we take 1926 away from 2040, we end up with 114.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1140, and continue the process.

In conclusion, the division gives 280846.4766 with a balance of 0.00114.