The product of 1 even and 1 odd no. is ​

The product of an even and odd number is always an even number.
Some examples to prove this are-
2 * 5 = 10 ( even )
4 * 7 = 28 ( even )
3 * 8 = 24 9 ( even )
10 * 5 = 50 ( even )
13 * 4 = 52 ( even )
15 * 8 = 120 ( even )

 Hope this will clear your doubts
Regards
Akanksha