Evaluate Arithmetic Expression

Given a string representing an arithmetic expression, evaluate it according to the following rules:

• The expression contains only positive integers.
• The operators allowed are + and *.
• Operator Precedence: multiplication has a higher precedence than addition. In other words, the expression is evaluated as if multiplication is done before addition.

Mathematical Formulation: Evaluate the expression $$E = T_1 + T_2 + \cdots + T_k$$ where each term $$T_i = F_{i1} \times F_{i2} \times \cdots \times F_{im}$$, and each factor is a positive integer.

inputFormat

A single line containing the arithmetic expression.

outputFormat

A single integer representing the result of the evaluated expression.

3+5

8