read a
read b
echo 'a + b =' (math "$a + $b") # Sum
echo 'a - b =' (math "$a - $b") # Difference
echo 'a * b =' (math "$a * $b") # Product
echo 'a / b =' (math "$a / $b") # Integer quotient
echo 'a % b =' (math "$a % $b") # Remainder
echo 'a ^ b =' (math "$a ^ $b") # Exponentation