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

### Instruction:
Sonja makes her own peanut butter with peanuts and oil in a blender. She uses a ratio of two ounces of oil to smooth out every eight ounces of peanuts. Her last batch of peanut butter weighed 20 ounces. How many ounces of oil did she use?

### Response:
 Sonja anatumia robo kikombe cha mafuta kwa robo kikombe cha karanga ili kutengeneza robo kikombe 2 + 8 = 10 ya siagi ya karanga.
Mchanganyiko wake wa mwisho ulikuwa na uzito wa robo kikombe 20, hivyo alitengeneza 20 / 10 = <<20/10=2>>2 mara uwiano wake.
Hivyo, alitumia robo kikombe 2 * 2 = 4 ya mafuta.