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

### Instruction:
A company was contracted to construct three buildings, with the second building being two times as tall as the first building. The third building had to be three times as tall as the combined height of the first and second buildings. If the first building was 600 feet, calculate the total height of the three buildings together.

### Response:
 Urefu wa jengo la pili ni mara mbili ya urefu wa jengo la kwanza, yaani 2*600 = <<2*600=1200>>1200 futi.
Urefu jumla wa majengo ya kwanza na ya pili ni 600+1200 = <<600+1200=1800>>1800 futi.
Jengo la tatu ni mara tatu ya urefu wa majengo ya kwanza na ya pili pamoja, yaani 3*1800 = <<3*1800=5400>>5400 futi.
Pamoja, majengo matatu yana urefu wa 5400+1800 = <<5400+1800=7200>>7200 futi.