630:(9*10) = 63:9=7*1=7
25*29*4 = 25*4 = 100 * 29 = 2900
15 * 35 * 2 * 4 = 15 * 2 = 30 * 4 = 120 * 35 = 4200
630:(9*10) = 63:9=7*1=7
25*29*4 = 25*4 = 100 * 29 = 2900
15 * 35 * 2 * 4 = 15 * 2 = 30 * 4 = 120 * 35 = 4200