Answer
Carlos's slims net worth now is
($N_{Now}$ ) 59$\times$$ 10^{9}$ Dollar
Work Step by Step
The total money of carlos slim is $N_{total}$ = 59$\times$$ 10^{9}$ Dollar
The money he give to me $N_{me}$= 100 Dollar
Carlo's net worth now $N_{Now}$= $N_{total}$-$N_{me}$
Substituting from the given data , we get,
$N_{Now}$=58999999900 Dollar $\approx$ 59$\times$$ 10^{9}$ Dollar
It is approximate the same.So Carlos's slims net worth now is
($N_{Now}$ ) 59$\times$$ 10^{9}$ Dollar