Why does 225.60 * 0.25 equal 56

It equals that because when you multiply a whole number by a decimal then the answer will always be smaller then the whole number.

Well first of all, 225.6 * 0.25 does NOT equal 56. It equal 56.4

Second of all, even if it did equal 56 ... our number system has been defined so that 225.6 * 0.25 just works out to 56.4 ... there's not really a reason it does equal 56.4