evennumberarray

def checkio(array):
    """
        sums even-indexes elements and multiply at the last
    """
    length = len(array)
    if length == 0:
        return 0
    ans = 0
    
    for x in range(length):
        if x==0 or x%2 ==0:
            ans = ans + array[x]
      
    return ans * array[length -1]

#These "asserts" using only for self-checking and not necessary for auto-testing
if __name__ == '__main__':
    assert checkio([0, 1, 2, 3, 4, 5]) == 30, "(0+2+4)*5=30"
    assert checkio([1, 3, 5]) == 30, "(1+5)*5=30"
    assert checkio([6]) == 36, "(6)*6=36"
    assert checkio([]) == 0, "Empty"

checkio = lambda array: sum(array[::2]) * sum(array[-1:])