128*(9/2)-(1/2)*128-2/(1/128).
128*(9/2)-(1/2)*128-2/(1/128)．
<gadget id="calculator">9 / 2</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">128 * (9/2)</gadget>
<output>576</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * 128</gadget>
<output>64</output>

<gadget id="calculator">1 / 128</gadget>
<output>1/128 = around 0.007812</output>

<gadget id="calculator">2 / (1/128)</gadget>
<output>256</output>

<gadget id="calculator">576 - 64 - 256</gadget>
<output>256</output>

<result>256</result>