well 400, so 20*20=10*10*2*2=5*5*2*2*2*2
log17.0002
400
700+1+4
20.0+3.0+0.005
20x20
20x20=400
Expaned form
200 Fdrfc
20 squared = 400 = (4 x 100) + (0 x 10) + (0 x 1)
40+4+0.8+0.01+0.005
157 is already prime. No factorization.
600+2 IS the expanded form! The regular form is 602.