Sure, you can work it out.
But I’ve never seen anyone proficient in math who had to use a calculator to multiply two numbers which were both less than 12.
Who wants to sit around waiting for a person who understands HOW to multiply two numbers to find some clever way to actually DO it? I’d rather work with someone who understands the concept but wasn’t too lazy to memorize the basic multiplication tables.
Who wants to sit around waiting for a person who understands HOW to multiply two numbers to find some clever way to actually DO it?I do. Because that's precisely the person who is going to find some clever way to do the less trivial stuff.