numarul "abc" se scrie 100a+10b+c, iar numarul "cba" se scrie 100c+10b+a
deci:
100a+10b+c= 3(100c+10b+a)+a+b+c
100a+10b = 300c+30b+3a+a+b
96a=300c+21b
a,b,c pot fi 1.....9, se calculeaza prin incercari...
a = 8, c=2, b=8
96*8=300*2+21*8
768 = 600+168
a=8, b=8, c=2
"abc"=882, "cba"=288
verificarea: 3*288+8+8+2=864+18=882="abc"
