puts "Input values of L, V1, V2, C:"
l=gets.to_f
v1=gets.to_f
v2=gets.to_f
c=gets.to_f
t=l/(v1-v2)
puts " "
puts "Values of T, n1, n2"
puts (t)
n1=l/(v1-v2)*v1/c
puts (n1)
n2=l/(v1-v2)*v2/c
puts (n2)
gets