166506 divided by 4 
We want to figure out the number of times 166506 can be divided by 4.

Step 1:
1 divided by 4 is 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Append the next digit (6) from the dividend to 1 and continue with: 16 / 4

Advancing to step 2:
The number 4 fits into 16 4 times, leaving a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we take 16 away from 16, we end up with 0.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 4

Moving on to step 3:
6 divided by 4 is 1 with a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 41.0
If we subtract 4 from 6, we get 2.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 4

On to step 4:
If we divide 25 by 4, we get 6 and a remainder of 1.
Record the quotient 6 as the next digit in the result. 
Result so far: 416.0
The remainder is 1 after subtracting 24 from 25.
Include the next digit (0) from the dividend after 1, then repeat: 10 / 4

On to step 5:
When dividing 10 by 4, we get 2 with a remainder of 2.
Put 2 as the next digit of the answer. 
Result so far: 4162.0
Deduct 8 from 10 and we're left with 2.
Take the next digit (6) from the dividend and append it to 2, then repeat: 26 / 4

Let's proceed to step 6:
26 divided by 4 is 6 with a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 41626.0
If we take 24 away from 26, 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.

Going ahead to step 7:
20 divided by 4 is 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 41626.5
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 8:
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: 41626.5
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.

Moving on to step 9:
If we divide 0 by 4, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 41626.5
The remainder is 0 after subtracting 0 from 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 41626.5, with a leftover of 0.0.