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

### Instruction:
John injures his shoulder while lifting weights.  After the injury, his bench press goes down 80%.  After a bit of training, he manages to triple the weight he can bench.  If he started with a 500-pound bench press, what is it now?

### Response:
 Alikuwa amepoteza paundi 500 * 0.8 = <<500*.8=400>>400 kutoka kwenye benchi lake.
Kwa hivyo, benchi lake lilishuka hadi 500 - 400 = <<500-400=100>>100 paundi.
Baada ya mazoezi, uzito wake uliongezeka hadi 100 * 3 = <<100*3=300>>300 paundi.