challenge activity

$6\mathrm{.}5\mathrm{.}2$: Writing mathematical functions.

$597256\mathrm{.}4277778.$qx$3$zqy$7$

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Complete the function gallons$\_$to$\_$liters$()$ that has one parameter as a volume in gallons. The function returns the volume converted to liters, given that $1$ gallon $=4\mathrm{.}54609$ liters.

Ex: If the input is $48,$ then the output is:

Liters: $218\mathrm{.}212$