 
<translate> Mmadụ iri anọ nọ na-agba ọsọ na ha niile nwere ụkwụ abụọ nke pụtara na ha nwere 40 * 2 = 80 ụkwụ. Ụkwụ ọ bụla chọrọ skates na skates ọ bụla nwere wiil 4 ya mere 80 * 4 = wiil 320 mgbe mmadụ niile na-agba skates. Azịza ikpeazụ ya bụ: 320. <eng> 40 people were roller skating and they all had 2 feet which means there were 40 * 2 = 80 feet. Each foot needs a roller skate and each roller skate has 4 wheels so 80 * 4 = 320 wheels when everyone skated.
The final answer: 320. 