Tolong dijawab sebisanyaa terima kasih!

1. 3.14 × 10^2 × 14
= 314 × 14
=4396 cm^2

2. 22/7 × 28 × 28 × 100
= 246400 cm^2

3. 22/7 × 20 x 20 x 7
= 8800 cm^2