Subtract 8 from grandpa's age, divide by 4, add 5, and finally multiply by 2, the result is 38 years old, what is grandpa's age?
爷爷的年龄减去8，除以4，再加上5，最后乘以2，结果是38岁，爷爷的年龄是多少岁？
<gadget id="calculator">38 / 2</gadget>
<output>19</output>

<gadget id="calculator">19 - 5</gadget>
<output>14</output>

<gadget id="calculator">14 * 4</gadget>
<output>56</output>

<gadget id="calculator">56 + 8</gadget>
<output>64</output>

<result>64</result>