We divide 221090 by 2
We want to figure out the number of times 221090 can be divided by 2.

Advancing to step 1:
2 divided by 2 is 1 with a remainder of 0.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 2 from 2, we get 0.
Append the next digit (2) from the dividend to 0 and continue with: 2 / 2

On to step 2:
If we divide 2 by 2, we get 1 and a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 11.0
If we take 2 away from 2, we end up with 0.
Grab the next digit (1) from the dividend, add it to 0, then carry on: 1 / 2

On to step 3:
1 divided by 2 is 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 110.0
Deduct 0 from 1 and we're left with 1.
Bring next digit (0) of the dividend behind the 1 and repeat the process: 10 / 2

Moving on to step 4:
2 goes into 10 5 times with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 1105.0
Subtract 10 from 10 to get 0.
Take the next digit (9) from the dividend and append it to 0, then repeat: 9 / 2

Step 5:
When dividing 9 by 2, we get 4 with a remainder of 1.
Use 4 as the next digit of our solution. 
Result so far: 11054.0
If we subtract 8 from 9, we get 1.
Bring next digit (0) of the dividend behind the 1 and repeat the process: 10 / 2

On to step 6:
2 goes into 10 5 times with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 110545.0
If we subtract 10 from 10, 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.

Let's proceed to step 7:
0 divided by 2 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 110545.0
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 8:
2 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 110545.0
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.

After the division, we end up with 110545.0 and a remainder of 0.0.