16921511 divided by 457 
We're looking to find how many times 457 goes into 16921511.

Going ahead to step 1:
1 divided by 457 is 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Take the next digit (6) from the dividend and append it to 1, then repeat: 16 / 457

Step 2:
16 divided by 457 is 0 with a remainder of 16.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 16, we end up with 16.
Take the next digit (9) from the dividend and append it to 16, then repeat: 169 / 457

On to step 3:
457 can be fit into 169 0 times, resulting in a remainder of 169.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 169, we end up with 169.
Bring next digit (2) of the dividend behind the 169 and repeat the process: 1692 / 457

Moving on to step 4:
When dividing 1692 by 457, we get 3 with a remainder of 321.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Deduct 1371 from 1692 and we're left with 321.
Grab the next digit (1) from the dividend, add it to 321, then carry on: 3211 / 457

Moving on to step 5:
457 can be fit into 3211 7 times, resulting in a remainder of 12.
Use 7 as the next digit of our solution. 
Result so far: 37.0
If we subtract 3199 from 3211, we get 12.
Take the next digit (5) from the dividend and append it to 12, then repeat: 125 / 457

On to step 6:
When dividing 125 by 457, we get 0 with a remainder of 125.
Use 0 as the next digit of our solution. 
Result so far: 370.0
Subtract 0 from 125 to get 125.
Include the next digit (1) from the dividend after 125, then repeat: 1251 / 457

Let's proceed to step 7:
If we divide 1251 by 457, we get 2 and a remainder of 337.
Put 2 as the next digit of the answer. 
Result so far: 3702.0
The remainder is 337 after subtracting 914 from 1251.
Take the next digit (1) from the dividend and append it to 337, then repeat: 3371 / 457

On to step 8:
The number 457 fits into 3371 7 times, leaving a remainder of 172.
The number 7 becomes the next digit in our result. 
Result so far: 37027.0
If we take 3199 away from 3371, we end up with 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

Step 9:
457 goes into 1720 3 times with a remainder of 349.
Use 3 as the next digit of our solution. 
Result so far: 37027.3
If we subtract 1371 from 1720, we get 349.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3490, and continue the process.

Step 10:
3490 divided by 457 is 7 with a remainder of 291.
The next digit of our result is 7. 
Result so far: 37027.37
Subtract 3199 from 3490 to get 291.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2910, and continue the process.

On to step 11:
When dividing 2910 by 457, we get 6 with a remainder of 168.
Put 6 as the next digit of the answer. 
Result so far: 37027.376
Subtracting 2742 from 2910 leaves us with 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Going ahead to step 12:
457 can be fit into 1680 3 times, resulting in a remainder of 309.
The next digit of our result is 3. 
Result so far: 37027.3763
If we subtract 1371 from 1680, we get 309.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3090, and continue the process.

On to step 13:
If we divide 3090 by 457, we get 6 and a remainder of 348.
Write down 6 as next digit of the result. 
Result so far: 37027.37636
If we subtract 2742 from 3090, we get 348.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3480, and continue the process.

Step 14:
The number 457 fits into 3480 7 times, leaving a remainder of 281.
Put 7 as the next digit of the answer. 
Result so far: 37027.376367
Subtract 3199 from 3480 to get 281.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2810, and continue the process.

Moving on to step 15:
When dividing 2810 by 457, we get 6 with a remainder of 68.
The next digit of our result is 6. 
Result so far: 37027.3763676
Subtract 2742 from 2810 to get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

On to step 16:
If we divide 680 by 457, we get 1 and a remainder of 223.
The number 1 becomes the next digit in our result. 
Result so far: 37027.37636761
Deduct 457 from 680 and we're left with 223.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2230, and continue the process.

The final outcome is 37027.37636761, with a leftover of 2.23e-07.