n, m, k = map(int, input().split())
bw = list(map(str, input().split()))
a = [int(input()) for i in range(n)]
op = bw.pop(0)
b = [int(i) for i in bw]

c = 0
for i in a:
	for j in b:
		if op == "*":
			c += i*j
			c %= 10**9+7
		else:
			c += i+j
print (c%k)