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

### Instruction:
Magdalena has an apple tree on their farm, producing very few apples each year for a while now. However, this year, the apple tree yield was excellent, and it grew 200 apples. Magdalena picked 1/5 of the fruits on the first day, twice that number on the second day, and 20 more apples than he picked on the first day on the third day. Calculate the total number of apples remaining in the tree.

### Response:
 Siku ya kwanza, Magdalena alivuna 1/5 * 200 matunda = <<1/5*200=40>>40 matunda.
Siku ya pili, alivuna 2 * 40 matunda = <<2*40=80>>80 matunda kutoka kwenye mti.
Idadi jumla ya matunda aliyovuna kwa siku mbili ni matunda 40 + matunda 80 = <<40+80=120>>120.
Siku ya tatu, alivuna matunda 40 + matunda 20 = <<40+20=60>>60 kutoka kwenye mti.
Idadi jumla ya matunda aliyovuna kwa siku tatu ni matunda 120 + matunda 60 = <<120+60=180>>180.
Hivyo, idadi ya matunda yaliyobaki kwenye mti ni matunda 200 - matunda 180 = <<200-180=20>>20.