 
<translate> Yawan bishiyoyi ya ninka na duwatsu sau uku, ma'ana akwai itatuwa 3 * 40 = 120 fiye da duwatsu a farfajiyar. Jimlar adadin bishiyoyi a cikin yadi shine 120 + 40 = 160. A hade, akwai bishiyoyi 160 + 40 = 200 da duwatsu a farfajiyar. Tun da yawan tsuntsaye ya ninka sau biyu na itatuwa da duwatsu a cikin farfajiyar, akwai 2 * 200 = 400 tsuntsaye a kan bishiyoyi. Amsar ita ce 400. <eng> The number of trees is three times more than the number of rocks, meaning there are 3 * 40 = 120 more trees than rocks in the courtyard. The total number of trees in the yard is 120 + 40 = 160. Combined, there are 160 + 40 = 200 trees and stones in the courtyard. Since the number of birds is twice the combined number of trees and stones in the courtyard, there are 2 * 200 = 400 birds on the trees. So the answer is 400. 