 
<translate> Ọ bụrụ na e wuru ụlọ nke mbụ ka o nwee ụlọ obibi 4,000, ụlọ nke abụọ, nke nwere ụlọ obibi 2 / 5 karịa ụlọ nke mbụ, ga-enwe ụlọ obibi 2 / 5 * 4000 = 1600 karịa. Ọnụ, ụlọ nke mbụ na nke abụọ ga-enwe 1600 + 4000 = 5600. Ụlọ nke atọ ga-enwe 120 / 100 * 1600 = ụlọ 1920. Na ngụkọta, Daleyza meriri oru ngo nke chọrọ ka o wuo ụlọ 5600 + 1920 = 7520. N'ihi ya, azịza ya bụ 7520. <eng> If the first building was designed to have 4000 units, the second building, which had 2 / 5 times as many units as the first building, was to have 2 / 5 * 4000 = 1600 more units. Together, the first and the second building had to have 1600 + 4000 = 5600. The third building was to have 120 / 100 * 1600 = 1920 units. Altogether, Daleyza won a project that required her to construct 5600 + 1920 = 7520 units.
Thus, the answer is 7520. 