n = int(input())
a = list(map(int, input().split()))
LIMIT = 10 ** 9
MOD = 10 ** 9 + 7

dist = []
tmp = []
for i in range(n + 1):
    if i == n or a[i] == 0:
        dist.append(tmp)
        tmp = []
    else:
        tmp.append(a[i])
def solve(a, n):
    # 区間[l, r)を考えつつつ、lとrを尺取りする
    r = 0
    ru_val = 1
    ptn_val = 1
    ans = 1
    for l in range(n):
        if l > 0:
            ru_val //= a[l - 1]
            ptn_val *= pow(pow(a[l - 1], (r - (l - 1)), MOD), MOD - 2, MOD)
            ptn_val %= MOD
        while r < n and  ru_val * a[r] < LIMIT:
            ru_val *= a[r]
            ptn_val *= ru_val
            ptn_val %= MOD
            r += 1
        ans *= ptn_val
        ans %= MOD
    return ans
  
ans = 0
for li in dist:
    if not li:
        continue
    ans += solve(li, len(li))
    ans %= MOD
print(ans)