29x4=116 elevi in clasele pregatitoare
28x4=112 elevi in clasele a l a
27x4=108 elevi in clasele a ll a
26x4=104 elevi in clasele a lll a
25x4=100 elevi in clasela a lV a
116+112+108+104+100=540 elevi in total
sau
29x4+28x4+27x4+26x4+25x4=
116+112+108+104+100=540