So first of all you have to open console of your browser.
1. Chrome
2. Firefox
3. Opera
DEMO:
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1. Chrome
- Just press CTRL + SHIFT + J to open console in chrome.
- Now just type your calculation to get result.
- 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:
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