It’s a scientific calculator free. To perform calculations, you can press the keys, or type on the actual calculator you like.
What is scientific calculator
A scientific calculator is a digital calculator of a kind designed to evaluate scientific, engineering and mathematical problems, generally but not always in hand. In typical applications, they have largely replaced slide rules and are frequently used in both education and technical environments.
The characteristics of modern scientific calculators typically vary much more than those of a regular 4 or 5-function calculator, but they varies between manufacturers and models.
Most scientific models traditionally use a single-line display similar to traditional pocket calculators, but many of them have additional digits (10-12). A few displays feature multi-line models using dot matrix displays similar to those used in graphics computers. Some models include Hewlett-Packard, Texas Instruments, Casio, Sharp and Cannon, all of them Japanese manufacturers.