  We propose a general recipe for chiral topological superconductor (TSC) in
two dimensions with multiple $N$ chiral Majorana fermion modes from a quantied
anomalous Hall insulator in proximity to an s-wave superconductor with
nontrivial band topology. A concrete example is that a $N=3$ chiral TSC may be
realized by coupling a magnetic topological insulator and the ion-based
superconductor such as FeTe$_{1-x}$Se$_{x}$ ($x=0.45$). We further propose the
electrical and thermal transport experiments to detect the Majorana nature of
three chiral edge fermions. A unique signature is that the two-terminal
electrical conductance of a quantized anomalous Hall-TSC junction obeys a
distribution averaged to $(2/3)e^2/h$, which is due to the random edge mode
mixing of chiral Majorana fermions and is distinguished from possible trivial
explanations.
