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Find AB, if A=[[6, 9],[ 2, 3]]and B=[[2 ...

Find AB, if `A=[[6, 9],[ 2, 3]]`and `B=[[2 ,6, 0],[ 7, 9, 8]]`.

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Given `A=[[6, 9],[ 2, 3]]`and `B=[[2 ,6, 0],[ 7, 9, 8]]`.
`AB=[[6, 9],[ 2, 3]].[[2 ,6, 0],[ 7, 9, 8]]`.
`=>[[6(2)+9(7),6(6)+9(9),6(0)+9(8)],[2(2)+3(7),2(6)+3(9),2(0)+3(8)]]`
`=>[[12+63,36+81,0+72],[4+21,12+27,0+24]]`
`=>[[75,117,72],[25,39,24]]`
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