(2).0.6*3. 14* 1+(0.6/2)? *3. 14*2≈2.45m?
(3). 12.56dm = 1.256m 1.256 * 2.5 * 5 = 15.7m?
(4).2*3. 14*2.4+(2/2)? * 3. 14 = 18.2 12dm?
(5). 0. 15 * 3. 14 * 2+0.942m?
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Exactly ☆ I hope to adopt it.