operations challenge

print("Let's do some maths")
a=int(input("enter number1: "))
b=int(input("enter number2: "))
command=input("choose operation: ")
if command=="+":
    result=a+b
    print(a, "+" ,b, "=",result)
elif command=="-":
    result=a-b
    print(a, "-" ,b, "=",result)
elif command=="*":
    result=a*b
    print(a, "*" ,b, "=",result)
elif command=="/":
    result=a/b
    print(a, "/" ,b, "=",result)
elif command=="%":
    result=a%b
    print(a, "%" ,b, "=",result)
else:
    print("Sorry I dont understand what is this kind of operation")
"""
    Here is another problem for computing an area of a triangle(assuming measurements are in cm)
    and shows how much my weekly shopping costs.
"""
#Area of a triangle
area=0.5*a*b
print("Area of triangle is: ",area, "cm sq")

#Shopping in $
clothing=int(input("cost for clothes: "))
stationery=int(input("cost for stationery: "))
food=int(input("cost for food: "))
shoes=int(input("cost for shoes: "))
sum=clothing + stationery + food + shoes
print("My Weekly Shopping Cost was: $",sum)