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

### Instruction:
A building has 20 floors. Each floor is 3 meters high, except for the last two floors. The last two floors are each 0.5 meters higher. How tall is the building?

### Response:
 Kuna ghorofa 20 - 2 = <<20-2=18>>18 ambazo kila moja ina urefu wa mita 3.
Hivyo ghorofa 18 za kwanza zina urefu wa mita 18 x 3 = <<18*3=54>>54.
Ghorofa mbili za mwisho kila moja ina urefu wa mita 3 + 0.5 = <<3+0.5=3.5>>3.5.
Hivyo urefu jumla wa ghorofa mbili za mwisho ni mita 3.5 x 2 = <<3.5*2=7>>7.
Hivyo, jengo lina urefu wa mita 54 + 7 = <<61=61>>61.