 
 <translate> Rebecca bought 3 * 6 = 18 bottles of soda. A week is 7 days, so she will drink 4 * 7 = 28 half bottles of soda in four weeks. A bottle is two half bottles, so she will drink 28 / 2 = 14 bottles of soda in four weeks. Thus, after 4 weeks, she will have 18 - 14 = 4 bottles of soda left.
The final answer: 4. <hau> Rebecca ta sayi 3 * 6 = kwalabe 18 na soda. A mako ne 7 days, don haka za ta sha 4 * 7 = 28 rabin kwalabe na soda a cikin makonni hudu. Kwalba guda biyu rabin kwalba ne, don haka za ta sha 28 / 2 = 14 kwalabe na soda a cikin makonni huɗu. Saboda haka, bayan makonni 4, za ta sami 18 - 14 = kwalabe 4 na soda. Amsar ƙarshe: 4. 