How many ways are there to write (1/2) as the sum of the reciprocals of three natural numbers (which can be the same)?
将(1/2)写成三个自然数(可以相同)的倒数之和，共有多少种方法？
<gadget id="calculator">5 / 1</gadget>
<output>5</output>

<gadget id="calculator">3 / 1</gadget>
<output>3</output>

<gadget id="calculator">5 + 1 + 3 + 1 + 1</gadget>
<output>11</output>

<result>11</result>