& lt;p & gt; Emu48 for Android-Ordinary calculators sometimes fail to cope with more complex tasks that require some functions for their easy solution. In such cases, old models of calculators come, which have everything you need. This simulator allows everyone to turn on one of the specific models and enter data to then untie them. More than 40 buttons with special functions, from which it is possible to create a large mathematical problem. Customize the app for yourself and enjoy easy operation.