USE YOUR WEB BROWSER AS CALCULATOR

So first of all you have to open console of your browser.




1. Chrome

•  Just press CTRL + SHIFT + J to open console in chrome.

• Now just type your calculation to get result.

2. Firefox

•  Just press CTRL + SHIFT + J to open console in Firefox.

• Now just type your calculation to get result.

3. Opera

•  Just press CTRL + SHIFT + I open console in
  Opera.

• Now just type your calculation to get result.

DEMO: