721631 divided by 4 
Our goal is to divide 721631 by 4.

On to step 1:
The number 4 fits into 7 1 times, leaving a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 3 after subtracting 4 from 7.
Include the next digit (2) from the dividend after 3, then repeat: 32 / 4

Going ahead to step 2:
32 divided by 4 is 8 with a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 18.0
Deduct 32 from 32 and we're left with 0.
Bring next digit (1) of the dividend behind the 0 and repeat the process: 1 / 4

On to step 3:
1 divided by 4 is 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 180.0
If we take 0 away from 1, we end up with 1.
Take the next digit (6) from the dividend and append it to 1, then repeat: 16 / 4

Step 4:
4 goes into 16 4 times with a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 1804.0
The remainder is 0 after subtracting 16 from 16.
Fetch the next digit (3) from the dividend, attach it to 0 and continue: 3 / 4

On to step 5:
4 can be fit into 3 0 times, resulting in a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 18040.0
Deduct 0 from 3 and we're left with 3.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 4

Let's proceed to step 6:
4 can be fit into 31 7 times, resulting in a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 180407.0
Deduct 28 from 31 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 7:
The number 4 fits into 30 7 times, leaving a remainder of 2.
Record the quotient 7 as the next digit in the result. 
Result so far: 180407.7
If we take 28 away from 30, we end up 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.

Step 8:
When dividing 20 by 4, we get 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 180407.75
Subtract 20 from 20 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.

Advancing to step 9:
When dividing 0 by 4, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 180407.75
Subtract 0 from 0 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.

Let's proceed to step 10:
4 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 180407.75
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 180407.75, with a leftover of 0.0.