what is 4/3 pi 3^3

if I'm not mistaken you could be trying to find the volume of a sphere.

$${\frac{{\mathtt{4}}}{{\mathtt{3}}}}{\mathtt{\,\times\,}}{\mathtt{\pi}}{\mathtt{\,\times\,}}{{\mathtt{3}}}^{{\mathtt{3}}}$$

$${\frac{{\mathtt{4}}}{{\mathtt{3}}}}{\mathtt{\,\times\,}}{\mathtt{\pi}}{\mathtt{\,\times\,}}{\mathtt{27}}$$   Now put this into your calculator to get . . .

113.0973 (4 d.c.p.) cubed units