gets
a = gets.split.map(&:to_i)
gets
b = gets.split.map(&:to_i)
b_numerator, b_denominator = b.partition.with_index { |_, i|
  i.odd?
}.map { |ary| ary.inject(:*) }

answer = a[0].quo(a[1..-1].inject(:*)) * (b_numerator.quo(b_denominator))
puts answer.to_s.split('/').join(' ')