16873889 ÷ 458 
We want to figure out the number of times 16873889 can be divided by 458.

Step 1:
458 can be fit into 1 0 times, resulting in a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Include the next digit (6) from the dividend after 1, then repeat: 16 / 458

On to step 2:
When dividing 16 by 458, we get 0 with a remainder of 16.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 16 leaves us with 16.
Append the next digit (8) from the dividend to 16 and continue with: 168 / 458

Moving on to step 3:
When dividing 168 by 458, we get 0 with a remainder of 168.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 168 leaves us with 168.
Grab the next digit (7) from the dividend, add it to 168, then carry on: 1687 / 458

Advancing to step 4:
458 goes into 1687 3 times with a remainder of 313.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we subtract 1374 from 1687, we get 313.
Append the next digit (3) from the dividend to 313 and continue with: 3133 / 458

On to step 5:
When dividing 3133 by 458, we get 6 with a remainder of 385.
Record the quotient 6 as the next digit in the result. 
Result so far: 36.0
The remainder is 385 after subtracting 2748 from 3133.
Append the next digit (8) from the dividend to 385 and continue with: 3858 / 458

On to step 6:
3858 divided by 458 is 8 with a remainder of 194.
The next digit of our result is 8. 
Result so far: 368.0
If we take 3664 away from 3858, we end up with 194.
Bring next digit (8) of the dividend behind the 194 and repeat the process: 1948 / 458

Going ahead to step 7:
If we divide 1948 by 458, we get 4 and a remainder of 116.
Use 4 as the next digit of our solution. 
Result so far: 3684.0
If we subtract 1832 from 1948, we get 116.
Append the next digit (9) from the dividend to 116 and continue with: 1169 / 458

On to step 8:
When dividing 1169 by 458, we get 2 with a remainder of 253.
Record the quotient 2 as the next digit in the result. 
Result so far: 36842.0
Subtract 916 from 1169 to get 253.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2530, and continue the process.

Going ahead to step 9:
458 can be fit into 2530 5 times, resulting in a remainder of 240.
Write down 5 as next digit of the result. 
Result so far: 36842.5
Subtract 2290 from 2530 to get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Moving on to step 10:
458 goes into 2400 5 times with a remainder of 110.
Use 5 as the next digit of our solution. 
Result so far: 36842.55
If we take 2290 away from 2400, we end up with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

The final outcome is 36842.55, with a leftover of 0.11.