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  • David Wong posted an update 4 months ago

    My name is David Wong. I am a scientist and mathematician living in Barcelona. I work as a doctor in mathematics and physics at the UPC. I have some personal projects, like Secalcula, a free online calculator website, with services like a percentage calculator, totally free. You can also calculate Spanish DNI letter.…[Read more]

  • David Wong's profile was updated 4 months ago

David Wong

Profile picture of David Wong

@secalcula

active 4 months ago