Carti............ Caiete........ Ron
2..................5..................74,5\×7
7...................10................243,5\×2
1........................................?
1........…...…..….?
___________________________
14..................35...............521,5
14................ 20...............487
15................34,5
1.....…........34,5:15=2, 3
1........................................(74,5-5×2,3):2=63:2=31,5