Bash Multiplying Decimal to int

Question

I read price from user input. When i multiply the input with int like this

T=\"$((PRICE*QTY))\"|bc; gives line 272: 12.

Answer 1

var=$(echo "scale=2;$PRICE*$QTY" |bc)

You can also use awk

awk -vp=$PRICE -vq=$QTY 'BEGIN{printf "%.2f" ,p * q}'