There are 24 roses in the garden, and there are 20 more roses than roses, how many more roses than roses?
花园里有玫瑰花24棵，月季花比玫瑰花的3倍多20棵，月季花比玫瑰花多多少棵？
<gadget id="calculator">24 * 3</gadget>
<output>72</output>

<gadget id="calculator">20 - 24</gadget>
<output>-4</output>

<gadget id="calculator">72 + (-4)</gadget>
<output>68</output>

<result>68</result>