tool niche

Hi there I have see a ad about this website https://nichetools.net/?utm_source=nichesitegrowth.beehiiv.com&utm_medium=newsletter&utm_campaign=i-built-an-online-tool-site-in-5-minutes&_bhlid=229b5c9976dbb866ff042c3882aadc440a2845ee can anyone have used this is it worth buying in 199$?/

I want to scrape this calculator https://calcularrfc.mx/ I have tried to use ChatGPT but I am unable to crack its formula can anyone please tell me how can I scrape this calculator ??