#include <stdio.h>
#include <stdlib.h>

int main() {
	char c;
	char n_[6];
	int n[50];
	char o[50];
	int pn_ = 0, pn = 0, po = 0;

	while ((c = getchar()) != '\n') {
		if (c == '*') {
			o[po++] = c;
			n_[pn_] = '\0';
			n[pn++] = atoi(n_);
			pn_ = 0;
		}
		else if (c == '+') {
			o[po++] = c;
			n_[pn_] = '\0';
			n[pn++] = atoi(n_);
			pn_ = 0;
		}
		else {
			n_[pn_++] = c;
		}
	}
	n_[pn_] = '\0';
	n[pn++] = atoi(n_);
	
	int r = n[0];
	int i;

	for (i = 0; i < pn - 1; i++) {
		if (o[i] == '*') r += n[i + 1];
		else r *= n[i + 1];
	}

	printf("%d\n", r);
	return 0;
}