7*m 4*m ---*n - ---*n 45 27
((7*m)/45)*n - (4*m)/27*n при m = 1
((7*m)/45)*n - (4*m)/27*n
((7*(1))/45)*n - (4*(1))/27*n
(7/45)*n - 4/27*n
n/135
m*n --- 135
0.00740740740740742*m*n
4*m 7*m*n - ---*n + ----- 27 45