16291718 ÷ 521 
We want to figure out the number of times 16291718 can be divided by 521.

Moving on to step 1:
521 can be fit into 1 0 times, resulting in a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Grab the next digit (6) from the dividend, add it to 1, then carry on: 16 / 521

Let's proceed to step 2:
521 can be fit into 16 0 times, resulting in a remainder of 16.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 16, we end up with 16.
Fetch the next digit (2) from the dividend, attach it to 16 and continue: 162 / 521

Advancing to step 3:
521 goes into 162 0 times with a remainder of 162.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 162, we get 162.
Bring next digit (9) of the dividend behind the 162 and repeat the process: 1629 / 521

Advancing to step 4:
The number 521 fits into 1629 3 times, leaving a remainder of 66.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtract 1563 from 1629 to get 66.
Fetch the next digit (1) from the dividend, attach it to 66 and continue: 661 / 521

Step 5:
521 can be fit into 661 1 times, resulting in a remainder of 140.
Write down 1 as next digit of the result. 
Result so far: 31.0
If we subtract 521 from 661, we get 140.
Include the next digit (7) from the dividend after 140, then repeat: 1407 / 521

Let's proceed to step 6:
If we divide 1407 by 521, we get 2 and a remainder of 365.
The next digit of our result is 2. 
Result so far: 312.0
Subtracting 1042 from 1407 leaves us with 365.
Append the next digit (1) from the dividend to 365 and continue with: 3651 / 521

Moving on to step 7:
3651 divided by 521 is 7 with a remainder of 4.
The number 7 becomes the next digit in our result. 
Result so far: 3127.0
If we subtract 3647 from 3651, we get 4.
Grab the next digit (8) from the dividend, add it to 4, then carry on: 48 / 521

Let's proceed to step 8:
521 goes into 48 0 times with a remainder of 48.
The next digit of our result is 0. 
Result so far: 31270.0
If we subtract 0 from 48, we get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Let's proceed to step 9:
521 can be fit into 480 0 times, resulting in a remainder of 480.
Put 0 as the next digit of the answer. 
Result so far: 31270.0
Subtract 0 from 480 to get 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Step 10:
521 goes into 4800 9 times with a remainder of 111.
Record the quotient 9 as the next digit in the result. 
Result so far: 31270.09
The remainder is 111 after subtracting 4689 from 4800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1110, and continue the process.

Advancing to step 11:
If we divide 1110 by 521, we get 2 and a remainder of 68.
Record the quotient 2 as the next digit in the result. 
Result so far: 31270.092
The remainder is 68 after subtracting 1042 from 1110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Step 12:
680 divided by 521 is 1 with a remainder of 159.
The number 1 becomes the next digit in our result. 
Result so far: 31270.0921
Deduct 521 from 680 and we're left with 159.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1590, and continue the process.

Step 13:
521 can be fit into 1590 3 times, resulting in a remainder of 27.
The next digit of our result is 3. 
Result so far: 31270.09213
Subtracting 1563 from 1590 leaves us with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Advancing to step 14:
If we divide 270 by 521, we get 0 and a remainder of 270.
Record the quotient 0 as the next digit in the result. 
Result so far: 31270.09213
Subtract 0 from 270 to get 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

On to step 15:
The number 521 fits into 2700 5 times, leaving a remainder of 95.
The next digit of our result is 5. 
Result so far: 31270.0921305
If we subtract 2605 from 2700, we get 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

On to step 16:
The number 521 fits into 950 1 times, leaving a remainder of 429.
Put 1 as the next digit of the answer. 
Result so far: 31270.09213051
If we subtract 521 from 950, we get 429.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4290, and continue the process.

The final outcome is 31270.09213051, with a leftover of 4.29e-07.