4.56*10-2/23=1.98*10-3
1.98*10-3*6.02*10^23=1.19*10^21
1.98*10-3*6.02*10^23=1.19*10^21
It seems to me that if you are having difficulty solving such simple math problems, then you need to contact a math tutor. I know one company that provides professional tutors. I think you could go there. Here is a link to this company https://www.ezymathtutoring.com.au/tutors/roseville-chase-2069. I am sure they will help you learn math and understand it.
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