When x=how much, 5x-7=11.
当x=多少时，5x-7=11．
<gadget id="calculator">11 + 7</gadget>
<output>18</output>

<gadget id="calculator">18 / 5</gadget>
<output>18/5 = around 3.6</output>

<result>18/5 = around 3.6</result>