<prompt> Tathmini 42icdot6-3i.  <response>: Ili kutathmini bidhaa ya thamani kamili za nambari mbili changamano, ninahitaji kukumbuka ufafanuzi wa thamani kamili ya nambari changamano. Ninajua kwamba ikiwa zabi, ambapo a na b ni nambari halisi, basi zsqrta2b2. Hii ina maana kwamba 42isqrt4222sqrt20 na 6-3isqrt62-32 sqrt45. Napata 42icdot6-3isqrt20cdotsqrt45sqrt90030. 