If hope, hope and cup represent a certain natural number from 1 to 9, if hope*hope+cup=50, hope*hope-cup=34, ask hope*hope*cup.
若希、望、杯三个字分别代表1到9中的某个自然数，若希*望+杯=50，希*望-杯=34，求希*望*杯．
<gadget id="calculator">50 + 34</gadget>
<output>84</output>

<gadget id="calculator">84 / 2</gadget>
<output>42</output>

<gadget id="calculator">50 - 34</gadget>
<output>16</output>

<gadget id="calculator">16 / 2</gadget>
<output>8</output>

<gadget id="calculator">42 * 8</gadget>
<output>336</output>

<result>336</result>