jwb yaaaaa yang jawab dapat pahala

A = 21 1/8
B = 5 7/18

a. 3 3/6 * 7 1/4=
    
     =(3 3/6=21/6) * (7 1/4=29/4)
     = (21/6 * 2=42/12) * (29/4 * 3=841/12)
     =42/12 * 841/12
    


b.5 7/9 * 1 4/8 =
   =(5 7/9=52/9) * (1 4/8=32/8)
   = (52/9*8=416/72) * (32/8*9=288/72)
   =416/72 * 288/72=119808/72=1664