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

### Instruction:
Michael wants to dig a hole 400 feet less deep than twice the depth of the hole that his father dug. The father dug a hole at a rate of 4 feet per hour. If the father took 400 hours to dig his hole, how many hours will it take for Michael to dig a hole that is 400 feet less than twice as deep as his father's hole working at the same rate?

### Response:
 Kwa kuwa baba yake alikichimba shimo kwa kasi ya futi 4 kwa saa, ikiwa baba yake alitumia masaa 400 kuchimba shimo, alikichimba shimo lenye kina cha futi 4*400 = <<4*400=1600>>1600.
Mara mbili ya kina cha shimo ambalo Michael baba yake alikichimba ni 2*1600 = <<2*1600=3200>>3200 futi.
Shimo ambalo Michael anataka kuchimba ni futi 400 chini ya mara mbili ya kina cha shimo ambalo baba yake alikichimba, jumla ya futi 3200-400 = <<3200-400=2800>>2800.
Kuchimba shimo lenye kina kirefu kwa futi 400 kuliko mara mbili ya kina cha shimo la baba yake akifanya kazi kwa kasi ya futi 4 kwa saa, Michael atalazimika kufanya kazi kwa masaa 2800/4 = <<2800/4=700>>700.