Math Problem conversion ?

Question

Boston uses1.2 x 10^9 gallons of water / day . How many gallons per/sec must be pumped from the harbor every second to supply the city

Answer 1

At least 13888.89 gal/sec

1.2 x 10^9= 1200000000 gallons per day

60 seconds in a minute x 60 minutes in a hour=3,600 seconds/hour

3,600 sec per hour x 24 hours per day =86,400 seconds in a day.

There are 86,400 seconds in a day.

1200000000/86,400= 1388.88888889 gallons/second