The answer: 1.4* 10^12
________________________
Explanation:
_____________________
Note: a * (b * c) = (a * b) * c ;
______________________________
7(2.3* 10^11) = (7) * 2.3 * 10^ 11 = 14.1 * 1^ 11; or 1.4 * 10^12
___________________________________________________
