A cylinder of wood has a base diameter of 2 decimeters and a height of 5 decimeters. Workers split the wood into two half cylinders along its diameter. What is the surface area of each half cylinder?
一个圆柱体木材，底面直径是2分米，高是5分米．工人沿着它的直径把这块木材劈成两个半圆柱体．每个半圆柱体的表面积是多少平方分米？
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1</gadget>
<output>3.14</output>

<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">3.14 * 2 * (5/2)</gadget>
<output>15.7</output>

<gadget id="calculator">2 * 5</gadget>
<output>10</output>

<gadget id="calculator">3.14 + 15.7 + 10</gadget>
<output>28.84</output>

<result>28.84</result>