Final answer:
To calculate the total hours worked by the cleanup crew, multiply the number of hours each member worked by the total number of crew members, yielding 1449 total hours worked.
Step-by-step explanation:
When calculating the total hours worked by a cleanup crew, you multiply the number of hours each crew member worked by the total number of crew members. In this case, each member of the 23-person crew worked 63 hours during the week. To find the total hours worked by the whole crew, you would perform the following multiplication:
23 members × 63 hours/member = 1449 total hours
Therefore, the cleanup crew put in a total of 1449 hours of work.