(1/2), (3/5), (8/13), (21/34), (55/89), how many.
(1/2)，(3/5)，(8/13)，(21/34)，(55/89)，多少．
<gadget id="calculator">55 + 89</gadget>
<output>144</output>

<gadget id="calculator">89 + 144</gadget>
<output>233</output>

<gadget id="calculator">144 / 233</gadget>
<output>144/233 = around 0.618026</output>

<result>144/233 = around 0.618026</result>