Click the buttons to multiply, divide, add, or subtract. Put in your two numbers to calculate. Please do not click two or 3 at the same time. This does not support fractions, so it's basically only for kindergartners to sixth graders.
For example, I click the multiplication symbol. It asks me my first number, and I type in 5. It asks me my second, and I type in 3. The symbol says the answer.