According to the rules of the previous numbers, fill in the appropriate number (1/2), (3/4), (9/8), (27/16) in the horizontal line, how many.
根据前面几个数的规律，在横线里填上适当的数(1/2)，(3/4)，(9/8)，(27/16)，多少．
<gadget id="calculator">27 * 3</gadget>
<output>81</output>

<gadget id="calculator">16 * 2</gadget>
<output>32</output>

<gadget id="calculator">81 / 32</gadget>
<output>81/32 = around 2.53125</output>

<result>81/32 = around 2.53125</result>