(60-(9.5+28-9))*0/(9/50).
(60-(9.5+28-9))*0/(9/50)．
<gadget id="calculator">28 - 9</gadget>
<output>19</output>

<gadget id="calculator">9.5 + 19</gadget>
<output>28.5</output>

<gadget id="calculator">60 - 28.5</gadget>
<output>31.5</output>

<gadget id="calculator">9 / 50</gadget>
<output>9/50 = around 0.18</output>

<gadget id="calculator">0 / (9/50)</gadget>
<output>0</output>

<gadget id="calculator">31.5 * 0</gadget>
<output>0</output>

<result>0</result>