2 1/2×2 4/5 1 3/5×7 1/2 2 2/9×2 19/40
2 1/2 * 2 4/5 =4 5/8 1 3/5 * 7 1/2 = 7 6/5 2 2/9 * 2 19/40= 5 1/2