There are infinitely many possible answers.
For example,
1*642
or 10*64.2
nothing
11x11
8x6
12 squared.
it is a prime number
1*98
Some thing
1x930=930
6x7=42
642 dividedby 83 equals what = 7.734939759036145
Numbers in a multiplication problem aren't added. In a multiplication sentence, the multiplicand times the multiplier equals the product.
2 x 7