calculate the l . c . m of 7 / 10 , 8 / 9 , 3 / 8 , 5 / 12 is :
required l . c . m = l . c . m . of 7 , 8 , 3 , 5 / h . c . f . of 10 , 9 , 8 , 12 = 840 / 1 = 840 answer is a
multiply(multiply(7, 8), multiply(3, 5))