Find the rules first, then fill in the numbers. (3/4), 1, (4/3), (16/9), how much, (256/81).
先找规律，再填数．(3/4)、1、(4/3)、(16/9)、多少、(256/81)．
<gadget id="calculator">16 / 9</gadget>
<output>16/9 = around 1.777778</output>

<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">(16/9) * (4/3)</gadget>
<output>64/27 = around 2.37037</output>

<result>64/27 = around 2.37037</result>