hello
[tex]7^3\times7^4[/tex]to solve a question like this, we need to use a law of indices
[tex]a^m+a^n=a^{m+n}[/tex]since both of them have the same base, we add up their powers whenever it's a multiplication operation
[tex]7^3\times7^4=7^{3+4}=7^7[/tex]
