Multiplication till 400

Calculate:

The number of examples:
Numerical difficulty:
Range of values:
Multiplicity:

18	×	17	=
7	×	7	=
15	×	11	=
6	×	4	=
22	×	16	=
15	×	19	=
13	×	11	=
18	×	10	=
16	×	12	=
14	×	19	=