Multiplication till 400

Calculate:

Number of examples:
Numerical difficulty:
Range of values:
Multiplicity:

19	×	19	=
7	×	7	=
15	×	25	=
15	×	13	=
11	×	9	=
23	×	17	=
12	×	9	=
14	×	23	=
16	×	22	=
6	×	9	=