Final answer:
Gabi has to wait 345,600 seconds for her birthday concert in 4 days, calculated by multiplying the number of seconds in a day (86,400) by 4.
Step-by-step explanation:
Gabi wants to know how many seconds she has left to wait until her birthday concert, which is in 4 days. To calculate this, we need to determine the number of seconds in one day and then multiply that by 4. There are 24 hours in a day, 60 minutes in an hour, and 60 seconds in a minute. Therefore, the number of seconds in one day is 24 hours/day × 60 minutes/hour × 60 seconds/minute, which equals 86,400 seconds. Now, multiplying this number by 4 gives us the total seconds Gabi has to wait, which is 345,600 seconds.