A cylindrical stainless steel drinking cup (without lid), the diameter of the bottom surface is 10cm, and the height is (6/5) of the diameter. What is the minimum size of stainless steel sheet needed to make this cup?
一个圆柱形不锈钢水杯(无盖)，底面直径10cm，高是直径的(6/5)．做这个水杯至少需要多大的不锈钢薄板？
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">3.14 * 25</gadget>
<output>78.5</output>

<gadget id="calculator">6 / 5</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">10 * (6/5)</gadget>
<output>12</output>

<gadget id="calculator">3.14 * 10 * 12</gadget>
<output>376.8</output>

<gadget id="calculator">78.5 + 376.8</gadget>
<output>455.3</output>

<result>455.3</result>