Answer
A stack of 24 tiles would weigh 4.44g.
5 stacks weighs 22.2kg
Work Step by Step
Multiply to compute the weight of 24 tiles.
$185g\times24=4440g$
Move the decimal to convert g to kg.
$4440g=4.44kg$
Multiply to compute the weight of 5 stacks.
$4.44kg\times5=22.2kg$