From The Image above shown I want some plugins, extensions, or codes of lines for chrome inspect element. I want to add the previious reading with +75 in new reading. Say foe eg in SL. NO 3 …Previous reading is 3052 and i want to add +73 and make it 3125 and fill in the Textbox automatically with chrome extension, codes, plugins without me using manual calculator and manual addition to fill the Text box.

Searched for extention , but it was just autofill.. i want autofill which include maths