Tolong pakai cara nyaa yaa makasih:)

284°F = 5/9 x (284 - 32) °C
           = 5/9 x 252 °C
           = 5 x 28 °C
           = 140°C

(5/9×284-32)
(5/9×252)
(5×28)
140 derajat celcius