 
<translate> N'izu abụọ ọ bụla, Grace ga na-enweta 300*2 = 600 dollar. Ọ ga-ewe Grace 1800 / 600 = 3 izu 2 iji nweta dollar 1800. Ọ ga-ewe Grace izu 3 * 2 = izu 6 n'ozuzu ya. Azịza ikpeazụ ya bụ: 6. <eng> Every two weeks, Grace will get 300 * 2 = 600 dollars. It will take Grace 1800 / 600 = 3 2 - week intervals to get 1800 dollars. It will take Grace 3 * 2 = 6 weeks in total. The final answer: 6. 