447 = 547 - 100
1 add 4 is 5 and 2 add 3 make 5. 5 add 5 make 10 so 2 x 10 is 20
19/4 make 5
You add -169.
0.6
3.2 + 1.8 = 5.0 = 5 so you need to add 1.8
4.41 + 0.59 = 5
1, 3, 5, 15, 149, 447, 745, 2235
1 x 2235, 3 x 745, 5 x 447, 15 x 149, 149 x 15, 447 x 5, 745 x 3, 2235 x 1
-36 and -5
3/5 9/15 447/745
1, 3, 5, 15, 149, 447, 745, 2235