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

this works:

PRICE=1.1
QTY=21
RES=$(echo "scale=4; $PRICE*$QTY" | bc)
echo $RES