Simplify 1.53 + 4.73 + 3.83 - 3 x 1.5 x 4.7 x 3.81.52 + 4.72 + 3.82 - 1.5 x 4.7 - 4.7 x 3.8 - 1.5 x 3.8

Apply  $\frac{a3 + b3 + c3 - 3abc}{a2 + b2 + c2 - ab - bc - ca} = a + b + c$

Hence the answer is  1.5 + 4.7 + 3.8 = 10.