Answer :

There is infinity many answers, but I can give you few examples
21*10=210
30*7=210
42*5=210
14*15=210
1 x 210 = 210
2 x 105 = 210
3 x 70 = 210
5 x 42 = 210 
6 x 35 = 210 
10 x 21 = 210
But there are more