225.
My 9th grade teacher made me memorize the squares of all numbers from 1 to 25 and I have never regretted the hour or so I spent on this task. You might be amazed at how useful this was-- I strongly recommend that you do the same.
30 multiplied by 15 is 450
600 multiplied by 15 is 9,000.
6 multiplied by 15 is 90.
15 multiplied by 1.75 is 26.25
80 multiplied by 15 is 1200.
15 multiplied by 15 is 225.
15 multiplied by 15 is 225.
16515 multiplied by 11 is 165.
11 multiplied by 15 is 165.
15 * 500= 7500
15
60