(659 874-650 094)*45/50+404 401*2 =

(659874-650094) *45/50  + 404401 *2=8176041) 659874-650094=97802) 9780  *  45/50 = (9780*45) / (1*50) = (978*9) / (1*1) = 88023) 404401*2 = 8088024) 8802+ 808802= 817604