Consider this example by my teacher:

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S.Let B BC 5 o 3 5 1 2 7 1 and C 4 3 o 1 6 4 3 0+0 1 Find BC 6 2(0) o 7 5(4) + 1(3) 0(4) 2(3) 3(4) + 7 (3) 012 5(1) + 1(6) 0(1) 2(6) 3(1) + 7 (6) O IS 23 6 33 20+3 06 12 +21 11 12 45 Final Answer