with open('gold.txt') as a:
    gold = a.read()
    

with open('silver.txt') as b:
    silver = b.read()
    

with open('iron.txt') as c:
    iron = c.read()
    

with open('diamond.txt') as d:
    diamond = d.read()

kg = input ("kilogram>")

print ('1 -- iron' )

print ('2 -- silver' )

print ('3 -- gold' )

print ('4 -- diamond' )

item = int(input (">"))

if item == 1: print (int(iron) * int(kg))

elif item == 2: print (int(silver) * int(kg))

elif item == 3: print (int(gold) * int(kg))

elif item == 4: print (int(diamond) * int(kg))

else: print ("gabim!")

print ("vazhdo? 1=po 2=jo")

cc = int(input ("vazhdo?>"))

if cc == 1:
    import os
    import subprocess
    subprocess.Popen(['app.bat'])

else: print ("ok")