 
<translate> N'ọnwa nke abụọ ọ bụla, Nina na-agba ọsọ okpukpu abụọ nke ebe ọ na-agba, nke pụtara na 400 * 2 = 800 kilomita. Afọ abụọ bụ ọnwa iri abụọ na anọ, yabụ ọkara oge a bụ 24 * 0.5 = ọnwa iri na abụọ. Ya mere, n'ime ọnwa iri na abụọ, Nina na-eme 400 * 12 = 4800 kilomita. N'ime ọnwa iri na abụọ ndị ọzọ, ọ na-eme 800 * 12 = 9600 kilomita. Ya mere, n'ime afọ abụọ, Nina ga-enwe ike ime 4,800 + 9,600 = 14,400 kilomita. <eng> Every second month Nina does twice the regular distance, which means 400 * 2 = 800 kilometers. Two years is 24 months, so half of this time is 24 * 0.5 = 12 months. So in 12 months Nina does 400 * 12 = 4800 kilometers. And in the other 12 months, she does 800 * 12 = 9600 kilometers. So in two years, Nina would be able to make 4800 + 9600 = 14400 kilometers. 