05. Orders

products = {}
line = input()

while not line == "buy":
    product, price, value = line.split()
    if product not in products:
        products[product] = [float(price), int(value)]
    else:
        products[product][1] += int(value)
        products[product][0] = float(price)
    line = input()

[print(f"{k} -> {v[0] * v[1]:.2f}") for k, v in products.items()]