Define a function calc$\_$num$()$ that has one parameter and returns the parameter minus $5\mathrm{.}9$ if the parameter is less than $8\mathrm{.}0.$ Otherwise, calc$\_$num$()$ returns $5\mathrm{.}9$ times the parameter.

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Ex $1$: If the input is $3\mathrm{.}2,$ then the output is:

$-2\mathrm{.}70$

Ex $2$: If the input is $12\mathrm{.}9,$ then the output is:

$76\mathrm{.}11$