Given the task definition and input, reply with output. In this task, you need to answer the given multiple-choice question on the gain. Gain is the value by which to multiply the input. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Problem: what is 66.67 % of 804 of 0.1666 ? 
Options: a ) 19.33 , b ) 54.55 , c ) 89.33 , d ) 97.21 , e ) 68.77

c