3) 5 * 11 * 5 * 8 * 5
5 * 11 * (5 * 8) * 5
5 * 11 * (40 * 5)
5 * 11 * 200
11 * (200 * 5)
11 * 1000
11000
4) 6 * 5 * 2 * 7 * 2
6 * (5 * 2) * 7 * 2
6 * 10 * 7 * 2
(6 * 7) * 10 * 2
42 * 10 * 2
(42 *2) * 10
84 * 10
840
5) 125 * 4 * 25
125 * (4 * 25)
125 * 100
12500
6) 75 * 50 * 4
75 * (50 * 4)
75 * 200
15000