#0001AB

Buka

Happen is often the time for teaching in the classroom a great noise. Students rather than to continue class. Rather talking about the economic crisis or the entrance into the European Union. Maximum noise occurs when students are not up with nothing, so they often because teachers set tasks with a lot of work to settle them. In one of these tasks than students are required to calculate results some computation operations of two large numbers. Computation operations, which we observe in this task are the operations of addition and multiplication operations, and operand i will be the potency of 10 with no more than 100 digits. Write a program that will implement the default operation of the given numbers.



InputIn the first line there is a natural number A. In the second row there is one of the characters' + 'or' * 'which represents the operation of addition or multiply. In the third line there is a natural number B. The numbers A and B are the potency of 10 and consist of up to 100 digits.


OutputIn the first line of the default print result of the operation of the given numbers.


Input:10
+
10


Output:20

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