Question: A tank has a capacity of 18000 gallons. Wanda and Ms. B decided to pump water from a pond to fill the tank in two days. On the first day, working in shifts, Wanda filled 1/4 of the tank's capacity with water, and Ms. B pumped 3/4 as much water as Wanda pumped into the tank that day. On the second day, Wanda pumped 2/3 of the amount of water she pumped on the previous day, while Ms. B only pumped 1/3 of the number of gallons she pumped on the first day. How many gallons of water are remaining for the tank to be full?
Give me a solution to this problem
Answer: 
On the first day, Wanda pumped 1/4*18000 gallons = 4500 gallons of water.
On the same day, Ms. B pumped 3/4*4500 gallons = 3375 gallons of water into the tank.
They pumped a total of 3375 gallons+ 4500 gallons = 7875 gallons together on the first day
On the second day, Wanda pumped 2/3 * 4500 gallons = 3000 gallons
Ms. B also pumped 3375 gallons * 1/3 = 1125 gallons
Together, on the second day, they pumped 3000 gallons + 1125 gallons = 4125 gallons
In the two days, they pumped a total of 4125 gallons + 7875 gallons = 12000 gallons
The amount of gallons remaining for the tank to be full is 18000 gallons - 12000 gallons = 6000 gallons