We divide 668573 by 4
Our goal is to divide 668573 by 4.

Step 1:
4 can be fit into 6 1 times, resulting in a remainder of 2.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 4 from 6 and we're left with 2.
Include the next digit (6) from the dividend after 2, then repeat: 26 / 4

Going ahead to step 2:
When dividing 26 by 4, we get 6 with a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 16.0
If we subtract 24 from 26, we get 2.
Bring next digit (8) of the dividend behind the 2 and repeat the process: 28 / 4

Let's proceed to step 3:
If we divide 28 by 4, we get 7 and a remainder of 0.
The next digit of our result is 7. 
Result so far: 167.0
Subtracting 28 from 28 leaves us with 0.
Append the next digit (5) from the dividend to 0 and continue with: 5 / 4

Moving on to step 4:
4 goes into 5 1 times with a remainder of 1.
The next digit of our result is 1. 
Result so far: 1671.0
If we subtract 4 from 5, we get 1.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 4

Advancing to step 5:
4 can be fit into 17 4 times, resulting in a remainder of 1.
The next digit of our result is 4. 
Result so far: 16714.0
Deduct 16 from 17 and we're left with 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 4

Going ahead to step 6:
When dividing 13 by 4, we get 3 with a remainder of 1.
Write down 3 as next digit of the result. 
Result so far: 167143.0
If we take 12 away from 13, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 7:
When dividing 10 by 4, we get 2 with a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 167143.2
Subtract 8 from 10 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 8:
4 goes into 20 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 167143.25
Deduct 20 from 20 and we're left 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.

On to step 9:
If we divide 0 by 4, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 167143.25
Deduct 0 from 0 and we're left 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.

Going ahead to step 10:
If we divide 0 by 4, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 167143.25
If we take 0 away from 0, we end up 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 167143.25, with a leftover of 0.0.