1) 4 1/9 * 3 3/10 = 37/9 * 33/10 = 407/30 = 13 17/30
2)13 17/30 + 126 13/60 = 407/30 + 7573/60 =814/60 + 7573/60 = 8387/60 = 139 47/60
3)139 47/60 * 1 5/10 = 8387/60 * 3/2 = 8387/40 = 209 27/40
4)209 27/40 : 60 = 8387/40 : 60 = 8387/40 * 1/60 = 8387/2400 = 3 1187/2400