Плиз помогите!!! Найдите значение выражения a × b : c, если: а) a=-12 b= 8 c=-6; б) а=-60; b= 0, c=5 в) а=-240, b=-30

а ) a = -12 b = 8 c = - 6; a × b : c = - 12 * 8 / ( - 6 ) = - 12 * 2 * 4 / ( - 2 * 3 ) = - 12 * 1 * 4 / ( - 1 * 3 ) = - 12 * 4 / ( - 3 ) = - 4 * 3 * 4 / ( - 3 ) = - 4 * 1 * 4 / ( - 1 ) = - 4 * 4 / ( - 1 ) = 4 * 4 = 16 б ) а = - 60 b= 0 c = 5 a × b : c = - 60 * 0 / 5 = - 12 * 0 / 5 = 0 * 5 = 0 в ) а = - 240 , b = - 30 c = - 9; a × b : c = - 240 * ( - 30 ) / ( - 9 ) = - 80 * ( -30 ) / ( - 3 ) = - 80 * ( - 10 ) / ( - 1 ) = 800 / ( - 1 ) = 800г) a = - 18 b = - 3 c = 9 a × b : c = - 18 * ( -3 ) / 9 = - 2 * ( - 3 ) / 1 = 2 * 3 = 6