old_contents: import sys
  
  s = 0.0
  
  for line in sys.stdin:
      a, b, c = line.split()
      a, b, c = int(a), int(b), float(c)
      s += c * b
  
  print(f'VALOR A PAGAR: R$ {s:.2f}')
  
new_contents: import sys
  
  s = 0.0
  
  for line in sys.stdin:
      a, b, c = line.split()
      a, b, c = int(a), int(b), float(c)
      s += c * b
  
  print(f"VALOR A PAGAR: R$ {s:.2f}")
  
subject: Fix lint