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

### Instruction:
The moon is made of 50% iron, 20% carbon, and the remainder is other elements. Mars weighs twice as much as the moon, but has the exact same composition. If Mars is 150 tons of other elements, how many tons does the moon weigh?

### Response:
 30% ya Mars inafanywa na elementi nyingine kwa sababu 100 - 50 - 20 = <<100-50-20=30>>30.
Mars ina uzito wa tani 500 kwa sababu 150 / .3 = <<500=500>>500.
Mwezi una uzito wa tani 250 kwa sababu 500 / 2 = <<500/2=250>>250.