Well, darling, the answer to your little math problem is 4. I mean, come on, it's not rocket science. 40 times 4 equals 160, so if you add another 20, you get 180. Easy peasy lemon squeezy!
40 if you divide 360 by 9 you get 40 and 40 time 9 equals 360
4x45 = 180
It is 30 times 6 equals 180
180/20=99*20=180
36 times 5 equals 180.
6 times 6 times 5 equals 180.
40 times 9 equals 360.
0.4 times 100 equals 40
7.2 x 25 = 180
4 x 45 = 180
5 x 36 = 180