10 dim a(2,3), b(3,2)
20 mat read a, b
30 data 1,2,3,2,4,5,3,5,2,4,5,7
40 mat c =  a . b
50 for x = 1 to 2 : for y = 1 to 2 : ?c(x, y), : next y : print : next x
60 ?"should have been"
70 ?22,34
80 ?39,61