Calculation for Masses of Gold are different between International standard and Myanmar, we need own calculator for that and that's the example

Basic Gold Price Calculator

# Declaration
mass = [];

def check_num num
	raise(ArgumentError, "Put Numbers only")  if /[[:alpha:]]/.match(num)
end

# Enter mass
puts "enter kyat, pyel, ywey with coma seperated value. 'x,y,z' "
input = gets

check_num input

input.chomp.delete(' ').split(',').each  do |m| 
	mass.push(m.to_f)
end

# In case of nil
mass[1] = mass[2] = 0 unless mass[1] and mass[2] 
# defining range
raise(ArgumentError, "Pyel must lower than 16 and ywey must lower than 8 ")  unless mass[1] < 16 and mass[2] < 8

puts "enter current Gold price"
input = gets
check_num input
price = input.to_f

puts "15 pyel or 16 pyel, enter numbers" 
input = gets
check_num input
pyel = input.to_f

 # Preparing Data 
result = (mass[0] + (mass[1]+ mass[2]/8)/pyel) * price
puts result