A little about the app Smart scientific calculator (115 * 991 / 300) plus

The calculator 991 ex contains following features:
• Scientific calculator 115 can perform exponent calculation, draw graph, work as calculator es 115, calculate simple and advanced expression like 991 + 115 / 300
• Advanced calculator es 300 includes symbolic integration, calculate integral and perform advance calculation task.
• 991 science calculator provides various tools for student such as LCM, GCD, random integer and solve equation.
• Engineering calculator 115 es is a useful tools for engineering student to calculate fraction, convert fraction to decimal, calculate pi number and over 991 math functions
• Barcode is also included in this app.
• Smart calculator 300 es helps you solve homework better by calculating automatically without pressing equal button.

Make sure that third-party apps are allowed on your device: go to Menu->Settings->Security-> and check "Unknown Sources"

Tap the APK file. Allow the app any required permissions it asks for. Then, at the bottom of the installer window, click INSTALL.

You'll see a confirmation the app is installed. Now you'll see the app available in your list of installed apps.