dumb questions

1.what is 2*2

2.what is 3*3

3.what is 4*4

clever qustions

4.what is 21*15

5.what is 72*17

6.what is 91*23

super clever questions

7.what is 333*12

8.what is 365*448

9.what is 999*123

ultra clever question

10.what is 1954*5995

What is it?

(Hint:numbers are the same)