calirific niste lucruri : *= produs
scriu abc = abc cu bara si a*b*c =produsul lor
cum stii ca abc =100*a+10*b+c =ab*10 +c
=>
62n +5mn+20m=1m6n =>
620 +n +500+ 10*m+n +200+m =1000 +100*m+60+n
=>(620+500+200) +n+n+10*m+m=1060+100*m+n=>
=> 1320 +2*n+11*m=1060 +100*m+n=>
=>260 +n =89*m
cum 89 e nr prim =>
=> (260+n) = multiplu de 89
dar n cifra => n poate fi de la 0-9 => n=7 => 267 =89*m=> m=3
deci 627+537+203=1367
