Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
Wallace's water heater is twice the size of Catherine's water heater. If the capacity of Wallace's water heater is 40 gallons and it's 3/4 full, calculate the total number of gallons of water they both have if Catherine's water heater is also full with water to 3/4 of its capacity.

### Response:
 Ikiwa bomba la maji la Wallace limejaa maji 3/4, lina galoni 3/4*40 = <<3/4*40=30>>30 za maji.
Kwa kuwa bomba la maji la Wallace ni mara mbili ukubwa wa bomba la maji la Catherine, bomba la maji la Catherine lina uwezo wa galoni 40/2 = <<40/2=20>>20.
Ikiwa bomba la maji la Catherine limejaa maji, lina galoni 3/4*20 = <<3/4*20=15>>15 za maji.
Pamoja, wakiwa wamejaa maji, bomba la maji la Wallace na Catherine lina galoni 30+15 = <<30+15=45>>45 za maji.