$${\mathtt{12}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{12}}{\mathtt{\,\times\,}}{\mathtt{\pi}}{\mathtt{\,\times\,}}{\mathtt{2}}}{{\mathtt{8}}}}$$
HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
21.424778
thanks tricent!!!!!!!!!!!!!!!! :D
*trincent sorry
YW! X3