Answer
$4.064$ billions.
Work Step by Step
Multiply total number of chickens eaten in one second in the U.S with number of seconds in a year.
$=127\times3.2\times10^{7}=(127\times3.2)\times10^{7}$
$=406.4\times10^{7}=4.064\times10^{2}\times10^{7}=4.064\times10^{9}=4.064$ billions.
