 
<translate> Idan an tsara gini na farko don samun gidaje 4000, gini na biyu, wanda ke da gidaje 2 / 5 sau da yawa kamar gini na farko, ya kamata ya sami 2 / 5 * 4000 = 1600 karin gidaje. Tare, gini na farko da na biyu dole ne su sami 1600 + 4000 = 5600. Ginin na uku ya kasance yana da 120 / 100 * 1600 = 1920 raka'a. Gabaɗaya, Daleyza ta sami nasarar aikin da ya buƙaci ta gina raka'a 5600 + 1920 = 7520. Saboda haka, amsar ita ce 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. 