(21,2544:0,9+1,02*3,2):5,6=
(21,2544:0,9+1,02*3,2):5,6=; 1)21,2544:0,9=23,616;/// 2)1,02*3,2=3,264;/// 3)23,616+3,264=26,88;////; 4)26,88:5,6=4,8