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

### Instruction:
At the park, Dimitri saw families riding bicycles and tricycles. Bicycles have two wheels and tricycles have three wheels.  6 adults were riding bicycles and 15 children were riding tricycles.   How many wheels did Dimitri see at the park?

### Response:
 Dimitri aliona matairi 2 x 6 = <<2*6=12>>12 kwenye baiskeli.
Aliuona matairi 15 x 3 = <<3*15=45>>45 kwenye pikipiki.
Aliuona jumla ya matairi 12 + 45 = <<12+45=57>>57.