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

### Instruction:
Ashley had a birthday party and invited 20 of her friends, telling them to each invite one more person to attend the party. If half the number of the invited guests each came with one more person, what's the total number of people at the party, including Ashley?

### Response:
 Ikiwa Ashley aliwaalika marafiki 20, basi idadi ya marafiki ambao kila mmoja alikuja na mtu mmoja zaidi ni 1/2*20 = <<20*1/2=10>>10.
Ikiwa marafiki 10 walikuja na watu 10 zaidi, idadi jumla ya wageni inakuwa 20+10 = <<10+20=30>>30 watu.
Ukiwaongezea Ashley, kuna watu 30+1 = <<30+1=31>>31 katika sherehe.