Mult/Div Strategy using 10 times table

I am learning how to use my ten time table.

There are 10 trays of cupcake and there are 8 cupcake on every tray.

So I know there are 80 cupcake in a tray because 10x8=80

Now for another question...

There 10 boxes of teddy bears and 9 in every box.

  

So I know there are 90 teddy bear in a box because  10x9=90