 
<translate> Tana amfani da fensir 2 a rana domin 10 / 5 = 2. Za ta yi amfani da fensir 90 a cikin kwanaki 45 domin 2 x 45 = 90. Za ta buƙaci fakitin fensir guda uku domin 90 / 30 = 3. Za ta kashe $12 domin 3 x 4 = 12. Amsar ƙarshe: 12. <eng> She uses 2 pencils a day because 10 / 5 = 2. She will use 90 pencils in 45 days because 2 x 45 = 90. She will need 3 packs of pencils because 90 / 30 = 3. She will spend $12 because 3 x 4 = 12. Final answer: 12. 