56 is 17 less than twice a number, what is this number?
56比一个数的2倍少17，这个数是多少？
<gadget id="calculator">56 + 17</gadget>
<output>73</output>

<gadget id="calculator">73 / 2</gadget>
<output>73/2 = around 36.5</output>

<result>73/2 = around 36.5</result>