code: def sum_of_multiples_below(a, b, total):
      total -= 1
      # sum of dividens of A + sum of dividens of B - sum of common dividens (because they're added twice)
      return (
          sum_of_dividends(total, a)
          + sum_of_dividends(total, b)
          - sum_of_dividends(total, a * b)
      )
  
label_desc: Use image node_id 1 for calling a global function with example usage: sum_of_multiples_below(a, b, total) and returns: unknown