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

### Instruction:
Dolly wants to ride the Ferris wheel twice, the roller coaster three times, and the log ride seven times. The Ferris wheel costs 2 tickets, the roller coaster costs 5 tickets and the log ride costs 1 ticket. Dolly has 20 tickets. How many more tickets should Dolly buy?

### Response:
 Inagharimu tiketi 2 x 2 tiketi/safari = <<2*2=4>>4 tiketi kupanda gurudumu la Ferris mara mbili.
Inagharimu tiketi 3 x 5 tiketi/safari = <<3*5=15>>15 tiketi kupanda roller coaster mara tatu.
Inagharimu tiketi 7 x 1 tiketi/safari = <<7*1=7>>7 tiketi kupanda roller coaster mara saba.
Jumla Dolly anahitaji tiketi 4 tiketi + 15 tiketi + 7 tiketi = <<4+15+7=26>>26 tiketi.
Dolly anahitaji kununua tiketi 26 tiketi - 20 tiketi = <<26-20=6>>6 tiketi zaidi.