210:42 = 210: (6*7)=5
315:5 = 315:(5*1)=63
360:72= 360:(8*9)=5
486:81=486:(9*9)=54:9=6
189:21=189:(3*7)=63:7=9
210:42 = 210: (6*7)=5
315:5 = 315:(5*1)=63
360:72= 360:(8*9)=5
486:81=486:(9*9)=54:9=6
189:21=189:(3*7)=63:7=9