MOD = 10**9 + 7

def main():
    import sys
    input = sys.stdin.read
    data = input().split()
    
    L = int(data[0])
    idx = 1
    inv2 = pow(2, MOD - 2, MOD)
    total = 1
    
    for _ in range(L):
        p = int(data[idx])
        e = int(data[idx + 1])
        idx += 2
        
        current_p = p % MOD
        if current_p == 1:
            a = (e + 1) % MOD
            b = (e + 2) % MOD
            s = (a * b) % MOD
            s = (s * inv2) % MOD
            total = (total * s) % MOD
        else:
            exponent = e + 2
            a = pow(current_p, exponent, MOD)
            term_p = (a - current_p) % MOD
            
            e_plus1 = (e + 1) % MOD
            p_minus1 = (current_p - 1) % MOD
            term_e = (e_plus1 * p_minus1) % MOD
            
            numerator = (term_p - term_e) % MOD
            denominator = (p_minus1 * p_minus1) % MOD
            denominator_inv = pow(denominator, MOD - 2, MOD)
            
            x = (numerator * denominator_inv) % MOD
            total = (total * x) % MOD
    
    print(total)

if __name__ == '__main__':
    main()