(29000000 square meters * 1 meter)/ 66 cubic meters is a cleaner way to do this math. (Or 29 square kilometers). Note you're using 29 vs. the grandparent's 26

(29000000 square meters * 1 meter)/ 66 cubic meters is a cleaner way to do this math. (Or 29 square kilometers). Note you're using 29 vs. the grandparent's 26, too.