You are downloading the ComplexCalc XAP file v220.127.116.11 for Windows Phone. ComplexCalc is a free and useful Education app: This app is a simple calculator that uses complex numbers. You can add, subtract, multiply, divide complex numbers. You can also calculate 1/z, ... You can now download the offline XAP file to install & try it.
Download Locations for ComplexCalc 18.104.22.168 XAP file
Note: To install it manually from an SD card, you should choose one of the server location above to get the offline ComplexCalc XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.