This is a QR code. A QR Code is a 2-dimensional barcode, which has encoded in it a URL (web address), text, or other information. It can be read by a QR code scanner, including QR scanner smartphone apps. Once you have an app installed on your smartphone, open the app and hold your phones camera over a QR code to read it. Most QR codes youll come across have a URL encoded, so chances are when you read the QR code it will take you to a web page.
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Here is our unit converter. To find the equivalent value of any inputted values in different units, input the value of the measurement and then select the base units to the right of it. The results will print out all equivalent conversions of the value/units that you have set.