22.4/4=?56*1.3=?1.8/12=?1.2*0.8=?25.2/6=?6.7*0.3=?
34.5/15=?0.56*0.04=?5.6/7=?2.4*6.2=?
0.75*18/0.15=?2.07/0.23/0.45