 
 <translate> Daleyza won a house construction project that involved the construction of three houses with several units. The first building was designed to have 4000 units, the second building 2/5 times as many units as the first building, and the third building was to have 20% more units than the second building. How many units were Daleyza contracted to build?
Thoughts? Step-by-step reasoning: <hau> Daleyza ya lashe aikin gina gida wanda ya hada da gina gidaje uku tare da raka'a da yawa. An tsara gini na farko don samun gidaje 4000, gini na biyu sau 2/5 kamar gidaje da yawa kamar gini na farko, kuma gini na uku ya kasance yana da gidaje 20% fiye da gini na biyu. Daleyza ya yi kwangilar gina gidaje nawa? Wani tunani? Dalili na mataki zuwa mataki: 