Press "×", "÷" twice to register a constant. The "K" indicator is displayed to indicate that a constant in effect. And the "K" symbol indicates the constant lock is valid. Please note that this will reverse the order of the input values, for example, if you input 4 ÷÷ 2, the result will be 0.5. (i.e. 2 ÷ 4) A constant lock can help to multiply/divide the constant number against a whole set of number. For example, if the calculation is 5×1, 5×2, 5×3, you can input 5 [×] [×] 1 [=] 2 [=] 3 [=] as the constant is 5.
