324*4 = (3*108)*4 = 3*(108*4)
So, if you knew 108*4 you could multiply that number by 3 to get the answer to 324*4.
But is it not at all clear why you would do that! First of all you need to work out the fact that 324 is actually 108*3 and then, multiplying 324 by 4 is really just as easy or difficult as multiplying 432 by 3. So one more step for no real gain.
324 = 3 x 108 324 x 4 = 3 x 108 x 4
324 is 3*108
105
The least common multiple of 81 and 108 is 324.
Since 108 is a factor of 324, it is automatically the GCF.
The GCF is 108.
324 x 4 = 1,296
0.0093
It would seem more sensible to do the multiplication directly.
108
The LCM is 3240.
108