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

### Instruction:
A grocery store has 4 kinds of jelly. They sell grape jelly twice as much as strawberry jelly, and raspberry jelly twice as much as plum jelly. The raspberry jelly sells a third as much as the grape jelly. If they sold 6 jars of plum jelly today, how many jars of strawberry jelly did they sell?

### Response:
 Wanauza mara mbili ya jeli ya raspberry kuliko jeli ya plum, hivyo waliuza vikombe 2 * 6 = <<2*6=12>>12 vya jeli ya raspberry.
Jeli ya raspberry inauzwa theluthi moja ya jeli ya zabibu, hivyo waliuza vikombe 12 * 3 = <<12*3=36>>36.
Jeli ya zabibu inauzwa mara mbili ya jeli ya strawberry, hivyo waliuza vikombe 36 / 2 = <<36/2=18>>18 vya jeli ya strawberry.