303:45 + 89 • 3000 - 13777= 303:45 + 267000 - 13777= 303:45 + 267000 - 13777= 267303:45 - 13777= 267165:45
303:45 + 89 • 3000 - 13777
= 303:45 + 267000 - 13777
= 303:45 + 267000 - 13777
= 267303:45 - 13777
= 267165:45