Fill in the numbers according to the law: (2/3), (4/9), (8/27), how much, (32/243)...
按规律填数：(2/3)，(4/9)，(8/27)，多少，(32/243)…
<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<gadget id="calculator">27 * 3</gadget>
<output>81</output>

<gadget id="calculator">16 / 81</gadget>
<output>16/81 = around 0.197531</output>

<result>16/81 = around 0.197531</result>