Răspuns:
21×[16×10:4-(400-8×5):9+41×18-153:0]:9:2:3:7:41=
=21×(160:4-360:9+738-0):9:2:3:7:41
=21×(40-40+738-0):9:2:3:7:41
=21×738:9:2:3:7:41
=15498:9:2:3:7:41
=1722:2:3:7:41
=861:3:7:41
=286:7:41
=41:41
=1
