Cutting into three sections means that if you see two knives, you will have more than four surface areas.

1)4

2) 125.6 divided by 4 = 4 = 31.4cm 2.

3) Saw 8 sections and 7 knives to increase the surface area 14.

14 times 3 1.4 = 139.6 cm2.

Hope to adopt