Would you like to cover decimal to binary (A) or binary to decimal (B)? Type A or B. When using (A) do not type in a number greater than 1000000 and when using (B) do not type more than 20 digits. On (A) do whatever you like, but on (B) it will not work unless your type in is 100% comprised of 1s and 0s. Any other number will be interpreted as a 0.
:)