 
<translate> Ajụjụ. Mark mere bọọdụ bọọdụ nke dị otu mita n'obosara. O ji okpukpu abụọ dị ogologo karịa ka o buru ibu. Gịnị bụ mpaghara nke chalkboard? Zaa ya. 18 afọ Olee ihe e kwuru nke na-egosi na azịza ya bụ eziokwu? <eng> Question. Mark made a chalkboard that is 3 feet wide. It is 2 times as long as it is wide. What is the area of the chalkboard?
Answer. 18
What step-by-step reasoning justifies that answer? 