721986 ÷ 16 
We want to figure out the number of times 721986 can be divided by 16.

Moving on to step 1:
The number 16 fits into 7 0 times, leaving a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 16

Advancing to step 2:
If we divide 72 by 16, we get 4 and a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtracting 64 from 72 leaves us with 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 16

Going ahead to step 3:
16 can be fit into 81 5 times, resulting in a remainder of 1.
Record the quotient 5 as the next digit in the result. 
Result so far: 45.0
If we take 80 away from 81, we end up with 1.
Include the next digit (9) from the dividend after 1, then repeat: 19 / 16

Advancing to step 4:
16 can be fit into 19 1 times, resulting in a remainder of 3.
Use 1 as the next digit of our solution. 
Result so far: 451.0
If we subtract 16 from 19, we get 3.
Grab the next digit (8) from the dividend, add it to 3, then carry on: 38 / 16

Advancing to step 5:
If we divide 38 by 16, we get 2 and a remainder of 6.
The next digit of our result is 2. 
Result so far: 4512.0
Subtract 32 from 38 to get 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 16

Going ahead to step 6:
The number 16 fits into 66 4 times, leaving a remainder of 2.
Write down 4 as next digit of the result. 
Result so far: 45124.0
Subtracting 64 from 66 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 7:
The number 16 fits into 20 1 times, leaving a remainder of 4.
The next digit of our result is 1. 
Result so far: 45124.1
The remainder is 4 after subtracting 16 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 8:
16 can be fit into 40 2 times, resulting in a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 45124.12
Subtracting 32 from 40 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 9:
16 goes into 80 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 45124.125
Subtract 80 from 80 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 10:
16 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 45124.125
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 11:
16 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 45124.125
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 45124.125 and a remainder of 0.0.