A=1.8 is known, b=1.75, c=1.83, d=1.90, e=1.65, f=1.77
In addition I=0.3, j=0.18, k=0.15, l=0.22
A - f number six any one can add I - j
For example (a + I + j + k + l) * b * c * d * * e f (a + I) or * (b + k) * c * (d + l) * e * (f + j)

And then calculate a * b * c * d * * e and f the product of the maximum value at the time of the maximum output a - f, respectively, and the numerical

This algorithm is how to write