Respuesta :
					                   56 is the awnser 
Simplify 7*4 to 28
28*2=7*(4*2)
Simplify 4*2 to 8
28*2=7*8
Simplify 28*2 to 56
56=7*8
Simplify 7*8 to 56
56=56
					                
					             Simplify 7*4 to 28
28*2=7*(4*2)
Simplify 4*2 to 8
28*2=7*8
Simplify 28*2 to 56
56=7*8
Simplify 7*8 to 56
56=56
