x=4**2022-6*4**522+5*64**510-3*2**330-100 x is translated into the number system with the base 8. Determine the number of digits "7" in the record of this number

x = 4 ** 2022 - 6 * 4 ** 522 + 5 * 64 ** 510 - 3 * 2 ** 330 - 100

def function():
    x = str(x)
    i = 0
    for a in x:
        if a == '7':
            i += 1
    return i

function()