15- &'.)*+/01,$\r%20-3"456789:;<=-\r?3.14 x 3 x 15 = 141.3 -\n5 142 -\r7`>?&'()@A0@BCDE?FGHI?$%JKLMNOP\r"1?NO?QR" I S " I.\rU V , X\r"2?NO?QR& ?BC\r?20-3\rZ[(NOUSX\r?\r?3.14 x 3 + 2 = 7.065 -\r?9.42 x 2 = 18.84 -\r\r?7.065 x 2 + 18.84 = 32.97 -\rZ[\NOVS]\r?\r?3.14 x 4 + 2 = 12.56 -\r?12.56 x 5 = 62.8 -\r\r?12.56 x 2 + 62.8 = 87.92 -\r8`()0@^B_?\r25.12 4 `.)^B_ab?cdeBfPg\rhi,#Bf20j k (l,#20jkBf3\r?\r?25.12 + 3.14 + 2 = 4 .\r3.14 x 4 2 = 50.24 P\r?25.12 x 4 = 100.48 \r\r?50.24 + 100.48 = 150.72 \rBfmn 150.72 x 20 = 3014.4jk