Find the Volume of a Pyramid with a Square Base $324 \mathrm {~m} ^ { 3 }$

Multiple Choice

Find the volume of a pyramid with a square base of 9 meters on each side and a height of 12 meters.

A) $324 \mathrm {~m} ^ { 3 }$
B) $108 \mathrm {~m} ^ { 3 }$
C) $973 \mathrm {~m} ^ { 3 }$
D) $1,296 \mathrm {~m} ^ { 3 }$
E) none of these