Ordinary calculators have only one display.This ScientificCalculator_Textboxes has 41 displays(18 textfields to display results and 23 textfields to display user input numbers). All the 41 textfields act as memory cells.You can copy either results or your own inputs.You can View,Edit and Copy your previous inputs. Example: 2x3 can be performed as followed:1)Locate the textfields separated by X sign.Enter 2 in first textfield and 3 in second textfield(as you touch any textfield the iPhone keyboard pops up.you can use the iPhone keyboard to enter&edit numbers).After entering your input numbers(2&3) touch the = sign located near to the second textfield where you entered 3.The result appears near the = sign you touched.