[tex]\Huge\bf\overbrace{\underline{ \underbrace{\blue \dag \orange{Answer}}}} \blue\dag[/tex]
[tex]\large\bf\mapsto{\underline{\red{volume \: of \: cube = {a}^{3} }}}[/tex]
[tex]\huge\bf\mapsto{\underline{\green{ {7}^{3} }}}[/tex]
[tex]\Large\bf\leadsto{\underline{\purple{ \: 7 \times 7 \times 7 = 343}}}[/tex]