If A # B means “A multiplied by B, the 2 is subtracted from the result”, what is the value of 4 #5 ?

A multiplied by B, the 2 is subtracted from the result
A को B से गुणा करने पर परिणाम से 2 घटा दिया जाता है
A * B -2 = Answer
According to rules given in the question
प्रश्न में दिये गये नियमों के अनुसार
A = 4 B= 5
$4\times 5 = 20 - 2 = 18 $