Calculate Total Production Cost

You are given several types of widgets. For each widget type, you are provided with three integers:

• W_i — the number of widgets of type i,
• P_i — the number of parts needed per widget of type i,
• C_i — the cost of each part.

Your task is to compute the total production cost using the formula:

$$Total\ Cost = \sum_{i=1}^{N} \left(W_i \times P_i \times C_i\right)$$

where N is the number of widget types.

inputFormat

The first line of the input contains a single integer N, representing the number of widget types. Following that, there are N lines, each containing three space-separated integers W_i, P_i, and C_i respectively.

outputFormat

Output a single integer, which is the total production cost computed using the given formula.

3
10 2 5
5 3 10
8 1 7

306