=36×36+36×2×13+36×38=36×(36+26+38)=36×100=3600 以上为简便计算过程。
36×36+36×2×13+36×38=36×(36+26+38)=36×100=3600
36x36+72x13+36x38=36x36+36x2x13+36x38=36x(36+26+38)=36x100=3600