 
<translate> Ajụjụ bụ: William bụ onye na-agba ịnyịnya. Ọ pụrụ ịnya ịnyịnya ya ruo awa 6 n'ụbọchị. N'ime ụbọchị isii, ọ na-eji oge ịnya ịnyịnya kachasị ugboro abụọ. N'ụbọchị abụọ ọ nọkwasịrị n'elu ịnyịnya ya nanị otu awa na ọkara n'ụbọchị ma jiri ọkara n'ime oge ahụ ọ ga-eji nọkwasị n'elu ịnyịnya ya mee ihe n'ụbọchị abụọ sochirinụ. Awa ole ka William nọkwasịrị n'elu ịnyịnya ya n'ime ụbọchị isii ahụ? Nzọụkwụ site na Nzọụkwụ: William jiri ụbọchị abụọ ruo ókè, nke pụtara 6 * 2 = awa 12 nke ịnya ịnyịnya. Ruo ụbọchị abụọ, ọ na-agba ịnyịnya 1.5 kwa ụbọchị, nke na-eme ka 1.5 * 2 = awa 3. N'ime ụbọchị abụọ sochirinụ, o ji ọkara oge kachasị nke pụtara 6 * 0.5 = awa 3 kwa ụbọchị. Nke ahụ pụtara na 2 * 3 = awa 6 n'ime ụbọchị abụọ ahụ. N'ihi ya, William nọkwasịrị n'elu ịnyịnya ya ruo awa iri na abụọ na atọ na isii, ya bụ awa iri abụọ na otu. <eng> The question is: William is a jockey. He can ride his horse for 6 hours a day. Over 6 days, he only used the maximum riding time twice. On two days he rode his horse for only 1.5 hours a day and half the maximum time for the next two days. How many hours did William ride his horse during those 6 days?
Step-by-step reasoning process: William used two days to the limit, which means 6 * 2 = 12 hours of horse riding. For two days he rode a horse 1.5 a day, which makes up to 1.5 * 2 = 3 hours. For the next two days, he used only half of the maximum time which means 6 * 0.5 = 3 hours a day. That means 2 * 3 = 6 hours during these two days. So in total William rode his horse for 12 + 3 + 6 = 21 hours.
 