Swap Multiplication

There are certain numbers, if you swap its digits and multiply will give the same result as the product of the numbers

examples
21 x 24 = 12 x 42 = 504
21 x 36 = 12 x 63 =756
21 x 48 = 12 x 84 = 1008
31 x 26 = 13 x 62 = 806
31 x 39 =13 x 93 =1209
32 x 46 = 23 x 64 =1472
32 x 69 = 23 x 96 = 2208
　there are more such numbers you can find out.