Verified Answer :

the answer is 21 all you had to do was multiply 7 by 3

mathgirl22

There are three thirds to make one whole.
So, you would multiply 7 by 3 and you get 21
There are 21 thirds in 7
You can check this by multiplying 21 by 3 and you will get 7.
Hope this helped :)
Have a nice day( I forget it is night already , sorry.)

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