A into 1= A
A into A=B
it might be wrong too
sorry for the inconvenience

thanks but i need exact valuesof the dashes

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If we have to fill the 4 gaps by choosing from the options given,

3 × 4 = A
or A = 12.

1 × 2 = B
or B = 2

now. A is a multiple of B. 
both dashes in each term are to be filled with same no
you mean all the dashes are to be filled by only one term???
then pick any number from the options...A will be equal to B and every option is a correct answer.