As given by the question
There are given that the 0.12 g of vitamin C in one tablet.
Now,
If 0.12 g vitamin in the one tablet, then
In the 60 tablets are:
[tex]0.12\times60=7.2g[/tex]Then,
To convert the gram into the milligram, multiply by 1000
So,
[tex]7.2\times1000=7200[/tex]Hence, 7200-milligram vitamin C contains in the 60 tablets.
